[Federal Register Volume 88, Number 51 (Thursday, March 16, 2023)]
[Rules and Regulations]
[Pages 16310-16369]
[FR Doc No: 2023-04370]

Vol. 88

Thursday,

No. 51

March 16, 2023

Part II

Department of Homeland Security

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Coast Guard

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46 CFR Parts 110, 111, 112, et al.

Update to Electrical Engineering Regulations; Final Rule

Federal Register / Vol. 88 , No. 51 / Thursday, March 16, 2023 /
Rules and Regulations

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DEPARTMENT OF HOMELAND SECURITY

Coast Guard

46 CFR Parts 110, 111, 112, and 113

[Docket No. USCG-2020-0075]
RIN 1625-AC66

Update to Electrical Engineering Regulations

AGENCY: Coast Guard, DHS.

ACTION: Final rule.

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SUMMARY: The Coast Guard is updating electrical engineering standards
that are incorporated by reference and adding acceptable alternative
standards. This rule also eliminates several outdated or unnecessarily
prescriptive electrical engineering regulations. This regulatory action
is consistent with the standards currently used by industry and
supports the Coast Guard's maritime safety mission.

DATES: This final rule is effective April 17, 2023. The incorporation
by reference of certain publications listed in the rule is approved by
the Director of the Federal Register on April 17, 2023. The
incorporation by reference of certain other publications listed in the
rule was approved by the Director as of April 30, 2015.

ADDRESSES: To view documents mentioned in this preamble as being
available in the docket, go to https://www.regulations.gov, type USCG-
2020-0075 in the search box and click ``Search.'' Next, in the Document
Type column, select ``Supporting & Related Material.''

FOR FURTHER INFORMATION CONTACT: For information about this document
call or email Raymond Martin, Systems Engineering Division, Coast
Guard; telephone<PHONE_NUMBER>, email [email protected].

SUPPLEMENTARY INFORMATION:

Table of Contents for Preamble

I. Abbreviations
II. Executive Summary
III. Basis, Purpose, and Regulatory History
IV. Discussion of Comments and Changes
V. Discussion of the Rule
    A. Revisions to Sec.  110.10-1 Incorporation by Reference
    B. Generator Prime Movers
    C. Electrical Cable
    D. IEC 60092-502 Electrical Installations in Ships--Part 502:
Tankers--Special Features
    E. Emergency Generator in Port
    F. Description of Additional Changes Within Subchapter J
VI. Incorporation by Reference
VII. Regulatory Analyses
    A. Regulatory Planning and Review
    B. Small Entities
    C. Assistance for Small Entities
    D. Collection of Information
    E. Federalism
    F. Unfunded Mandates
    G. Taking of Private Property
    H. Civil Justice Reform
    I. Protection of Children
    J. Indian Tribal Governments
    K. Energy Effects
    L. Technical Standards and Incorporation by Reference
    M. Environment

I. Abbreviations

1972 COLREGS International Regulations for Preventing Collisions at
Sea, 1972
ABS American Bureau of Shipping
ABYC American Boat and Yacht Council
AC Alternating current
ACP Alternative Compliance Program
ANSI American National Standards Institute
API American Petroleum Institute
ASME American Society of Mechanical Engineers
ASTM ASTM International
BLS Bureau of Labor Statistics
BSEE Bureau of Safety and Environmental Enforcement
CAN Canadian National Standard
CFR Code of Federal Regulations
CG-ENG Coast Guard Office of Design and Engineering Standards
CSA CSA Group, formerly Canadian Standards Association
DC Direct current
DHS Department of Homeland Security
DVTP Design verification test procedure
EMC Electromagnetic compatibility
Ex Designation of explosion-protected electrical apparatus complying
with IEC standards
FR Federal Register
GS General Schedule
hp Horsepower
HVSC High voltage shore connection
IACS International Association of Classification Societies
IBR Incorporated by reference
IEC International Electrotechnical Commission
IECEx System IEC System for Certification to Standards Relating to
Equipment for Use in Explosive Atmospheres
IEEE Institute of Electrical and Electronics Engineers
IMO International Maritime Organization
ISA International Society of Automation
ISO International Organization of Standardization
kV Kilovolt
kW Kilowatt
LED Light-emitting diode
MISLE Marine Information for Safety and Law Enforcement
mm\2\ Square millimeter
MODU Mobile Offshore Drilling Unit
MOU Mobile Offshore Unit
MSC Marine Safety Center
NAVSEA Naval Sea Systems Command
NEC National Electric Code
NEMA National Electrical Manufacturers Association
NFPA National Fire Protection Association
NPRM Notice of Proposed Rulemaking
NVIC Navigation and Vessel Inspection Circular
OCS Outer Continental Shelf
OCSNCOE Outer Continental Shelf National Center of Expertise
OMB Office of Management and Budget
OSV Offshore Supply Vessel
PSTP Periodic safety test procedure
QFA Qualitative failure analysis
RA Regulatory analysis
Sec.  Section
SOLAS International Convention for Safety of Life at Sea, 1974
U.S.C. United States Code
V Volts

II. Executive Summary

    Subchapter J of title 46 of the Code of Federal Regulations (CFR)
contains the electrical engineering regulations and standards
applicable to vessels and required shipboard systems regulated under
subchapters D, H, I, I-A, K, L, O, Q, R, T, U, and W of title 46. A key
component of subchapter J is the standards that are incorporated by
reference (IBR) in 46 CFR 110.10-1 and cross-referenced throughout
parts 110, 111, 112, and 113. On April 22, 2021, the Coast Guard
published a notice of proposed rulemaking (NPRM) that contains a
detailed description of the background and proposed changes. (86 FR
21440).
    This final rule updates prior incorporations by reference in 46 CFR
110.10-1 and all of the sections in subchapter J that reference the
updated IBR standards, adds a limited number of alternative standards,
and eliminates outdated or unnecessarily prescriptive regulations in
subchapter J. More specifically, this rule incorporates more recent
editions of many standards, incorporates by reference additional
standards for certain topics, and removes IBR standards that are no
longer actively used by industry. Due to technological advances, it is
necessary to update the current standards to ensure modern technologies
are addressed in the regulations. In addition to updating the IBR
standards, this rule implements the following four changes to
subchapter J.
    First, this rule eliminates the prescriptive requirements in 46 CFR
111.12-1(b) and (c) for generator prime movers. In accordance with 46
CFR 58.01-5, these generator prime movers continue to be required to
meet standards of the American Bureau of Shipping (ABS) Steel Vessel
Rules.
    Second, this rule simplifies the electrical cable construction
requirements in subpart 111.60 so they are similar to the
classification society requirements currently accepted without
supplement under the Coast

Guard's Alternate Compliance Program (ACP).
    Third, for classifications of hazardous locations in subpart
111.105, this rule adds the International Electrotechnical Commission's
(IEC) 60092-502 as an alternative classification. This is an
internationally accepted standard, and we are not aware of any notable
casualty history attributed to its use as compared to vessels complying
with the current applicable U.S. regulations for classification of
hazardous locations.
    Fourth, this rule amends 46 CFR subpart 112.05 to allow the use of
an emergency generator in port. This optional capability to use
emergency generators in port is acceptable if a set of additional
safeguards, approved by the International Maritime Organization (IMO)
in 2005, are provided to ensure the availability of emergency power.
    The following table provides an overview of the types of changes
and the affected sections.

           Table 1--Title 46 CFR Sections Affected by the Rule
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                                                   Affected title 46 CFR
           Category                  Changes              sections
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Incorporated by Reference       Editorial........  Sec.  Sec.   110.15-
 (IBR) Standards.                                   1, 111.01-15, 111.05-
                                                    9, 111.12-3, 111.12-
                                                    5, 111.12-7, 111.20-
                                                    15, 111.30-1, 111.30-
                                                    5, 111.30-19, 111.33-
                                                    3, 111.33-5, 111.33-
                                                    11, 111.35-1, 111.40-
                                                    1, 111.50-3, 111.50-
                                                    5, 111.50-7, 111.50-
                                                    9, 111.60-1, 111.60-
                                                    2, 111.60-6, 111.60-
                                                    11, 111.60-13,
                                                    111.60-19, 111.60-
                                                    21, 111.70-1, 111.75-
                                                    17, 111.75-20,
                                                    111.99-5, 111.105-3,
                                                    111.105-11, 111.105-
                                                    17, 111.105-19,
                                                    111.105-31, 111.105-
                                                    35, 111.105-40,
                                                    111.105-41, 111.105-
                                                    45, 111.106-3,
                                                    111.106-5, 111.106-
                                                    7, 111.106-13,
                                                    111.106-15, 111.107-
                                                    1, 111.108-1,
                                                    111.108-3, 112.50-1,
                                                    113.10-7, 113.20-1,
                                                    113.25-1, 113.30-25,
                                                    113.30-25, 113.30-
                                                    25, 113.37-10,
                                                    113.40-10, 113.65-5.
                                Updating to more   Sec.  Sec.   110.15-
                                 recent edition     1, 111.12-1, 111.12-
                                 with changes in    7, 111.15-2, 111.51-
                                 technical          5, 111.54-1, 111.55-
                                 content.           1, 111.59-1, 111.60-
                                                    5, 111.60-7, 111.60-
                                                    11, 111.60-13,
                                                    111.60-23, 111.70-1,
                                                    111.75-18, 111.81-1,
                                                    111.105-3, 111.105-
                                                    11, 111.105-33,
                                                    111.105-37, 111.105-
                                                    39, 111.106-3,
                                                    111.107-1, 111.108-
                                                    3, 113.05-7.
                                Providing          Sec.  Sec.   110.15-
                                 additional         1, 111.01-9, 111.15-
                                 options.           10, 111.20-15,
                                                    111.30-5, 111.30-19,
                                                    111.50-3, 111.53-1,
                                                    111.59-1, 111.60-1,
                                                    111.60-9, 111.60-13,
                                                    111.75-17, 111.75-
                                                    20, 111.81-1, 111.83-
                                                    7, 111.87-3, 111.105-
                                                    3, 111.105-11,
                                                    111.105-17, 111.105-
                                                    28, 111.105-29,
                                                    111.105-50, 111.106-
                                                    3, 111.106-5,
                                                    111.108-3, 113.05-7,
                                                    113.10-7, 113.20-1,
                                                    113.25-11, 113.30-
                                                    25, 113.37-10,
                                                    113.40-10.
Generator prime mover alarms    Removing unique    Sec.   111.12-1.
 and shutdowns.                  Coast Guard
                                 requirements.
Electrical cable requirements.  Proposing          Sec.   111.60-1.
                                 additional
                                 option.
                                Removing           Sec.  Sec.   111.60-
                                 prescriptive       1, 111.60-3, 111.105-
                                 requirements       50.
                                 (existing
                                 sections).
Classification of hazardous     Proposing          Sec.  Sec.   111.105-
 location.                       additional         3, 111.105-17,
                                 options.           111.105-28.
                                Editorial--Harmon  Sec.  Sec.   111.105-
                                 izing              1, 111.105-3,
                                 requirements       111.105-11, 111.105-
                                 between subparts.  15 (existing),
                                                    111.105-17, 111.105-
                                                    31, 111.106-3,
                                                    111.108-3.
Emergency generator...........  Allowing use in    Sec.   112.05-7.
                                 port.
                                Revising alarms    Sec.   112.50-1.
                                 and shutdowns.
Editorial changes (Other than   .................  Sec.  Sec.   110.15-
 IBR standards).                                    1, 110.25-1, 110.25-
                                                    3, 111.05-3, 111.05-
                                                    37, 111.10-1, 111.10-
                                                    9, 111.12-11, 111.12-
                                                    13, 111.15-25,
                                                    111.15-30, 111.30-5,
                                                    111.30-25, 111.30-
                                                    27, 111.30-29,
                                                    111.33-1, 111.33-3,
                                                    111.33-5, 111.33-7,
                                                    111.33-9, 111.33-11,
                                                    111.50-3, 111.51-1,
                                                    111.51-2, 111.51-3,
                                                    111.51-6, 111.52,
                                                    111.60-7, 111.95-1,
                                                    111.99-3, 111.103,
                                                    111.105-1, 111.105-
                                                    3, 111.105-5, 11.105-
                                                    7, 111.105-9,
                                                    111.105-15, 111.105-
                                                    32, 111.107-1,
                                                    112.01-20, 112.05-5,
                                                    112.15-1, 112.50-1.
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III. Basis, Purpose, and Regulatory History

    The legal basis of this rule is section 1333(d) of Title 43, United
States Code (U.S.C.), sections 3306 and 3703 of Title 46 U.S.C., and
Department of Homeland Security (DHS) Delegation No. 00170.1, Revision
No. 01.2. The provisions of 43 U.S.C. 1333(d) grant the Secretary of
the Department in which the Coast Guard is operating the authority to
promulgate and enforce regulations with respect to lights and other
warning devices, safety equipment, and other matters relating to the
promotion of safety of life and property on artificial islands,
installations, and other devices. The provisions of 46 U.S.C.
3306(a)(1) authorize the Secretary to prescribe regulations for the
design, construction, alteration, repair, and operation of vessels
subject to inspection, including equipment, appliances, propulsion
machinery, auxiliary machinery, boilers, unfired pressure vessels,
piping, and electric installations. Additionally, 46 U.S.C. 3703 grants
the Secretary authority to provide for navigation and vessel safety and
protect against hazards to life, property, and the marine environment
by regulating vessel construction, alteration, repair, maintenance,
operation, and equipping. DHS Delegation No. 00170.1, Revision No.
01.2, paragraph (II)(92)(b), delegates these authorities to the Coast
Guard.
    The purpose of this rule is to update the standards incorporated by
reference in 46 CFR subchapter J, which provide detailed specifications
for electrical equipment used by vessels. Newly published editions of
the international standards referenced in subchapter J address new
technologies and changes in best practices. The Office of Management
and Budget's (OMB) Circular A-119 states agencies should undertake a
review of the standards

incorporated by reference every 3 to 5 years to remain current with
technological changes. OMB encourages reducing reliance on unique
government standards when an existing voluntary consensus standard
would suffice. This rule follows the Circular by incorporating newer
editions of industry standards and reducing the reliance on unique
Coast Guard standards where industry standards are sufficient.
    On April 22, 2021, the Coast Guard published a NPRM titled ``Update
to Electrical Engineering Regulations'' (86 FR 21440) requesting
comments on the proposed changes implemented by this final rule,
including several updates to the standards incorporated by reference. A
detailed description of the background and proposed changes are
available in that NPRM. See 86 FR at 21442-60.

IV. Discussion of Comments and Changes

    During the comment period for the April 22, 2021 NPRM (86 FR
21440), which ended on July 21, 2021, we received 15 comments. Several
commenters expressed their support for the Coast Guard updating the
standards incorporated by reference to newer editions and some
confirmed they use them in current practice. The comments also offered
us feedback on specific changes to the electrical engineering
requirements and standards we proposed to incorporate by reference. The
comments can be viewed in the docket following the instructions in the
ADDRESSES section of this preamble. We summarize the comments and our
responses, starting with general comments and then responding in order
of relevant CFR section. Within each CFR section, we describe any
changes to the final rule regulatory text from what was proposed in the
NPRM.

General

    A commenter submitted an editorial comment on the list of
abbreviations in Section II for ``MOU.'' In this final rule, MOU is now
correctly defined as Mobile Offshore Unit.
    A commenter requested we update 33 CFR subchapter N to clarify the
application of this rulemaking to Outer Continental Shelf (OCS)
facilities and stated that, at a minimum, the Coast Guard should update
33 CFR 143.120 to establish the date on which the proposed rule would
apply to a new floating OCS facility. Where subchapter N requires
compliance with subchapter J, the date of applicability for vessels and
facilities will begin 30 days after publication of this final rule, in
accordance with the revised Sec.  110.01-1(b). The updated requirements
and standards in subchapter J apply to electrical installations
contracted for after the effective date of the final rule.
    The commenter also noted that the Bureau of Safety and
Environmental Enforcement (BSEE) in the Department of the Interior is
working on a regulatory update to incorporate more modern industry
standards and recommended the Coast Guard engage with BSEE to ensure
that both regulatory efforts are aligned, as the agencies propose to
incorporate different revisions of the same industry standard in at
least two cases. The Coast Guard and BSEE have a shared mission of
ensuring safety on the OCS. We work closely together to ensure our
requirements are not in conflict with each other, even if we use
different revisions of the same standard. Because this final rule is
not adding any new requirements for vessel owners and operators, it
will not cause any conflicts with BSEE requirements. Any specific
concerns can be addressed to either the Coast Guard's Eighth District
Outer Continental Shelf Division staff (website: https://www.atlanticarea.uscg.mil/D8/OCS/) or the Coast Guard's Outer
Continental Shelf National Center of Expertise (OCSNCOE) (website:
https://www.dco.uscg.mil/OCSNCOE/).
    Two commenters requested that we clarify the applicability of
subchapter J to Floating Production Units (FPUs), as the Coast Guard
Office of Design and Engineering Standards' (CG-ENG) relevant policy
letter, CG-ENG Policy Letter 01-13,\1\ only applies to classed FPUs
rather than all FPUs in service. Similarly, a commenter requested that
the Coast Guard clarify the applicability of subchapter J to floating
OCS facilities, as the application of the subchapter has led to many
requests for equivalencies and alternatives for a class of
installations that may not technically be vessels. The comment stated
that the Coast Guard should act on the National Offshore Safety
Advisory Committee's recommendation that the Coast Guard issue a task
statement to evaluate the suitability of subchapters F and J for
floating OCS facilities. These requests are outside the scope of this
rulemaking, which focuses on updating the electrical engineering
standards set out in subchapter J but not further amending the
applicability of subchapter J. Nevertheless, we have shared them with
the appropriate Coast Guard offices. We encourage questions regarding
the applicable regulations for floating OCS facilities to be sent to
either the Coast Guard's Eighth District Outer Continental Shelf
Division Staff (website: https://www.atlanticarea.uscg.mil/D8/OCS/) or
OCSNCOE (website: https://www.dco.uscg.mil/OCSNCOE/).
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    \1\ https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/5ps/Design%20and%20Engineering%20Standards/docs/CG-ENG%20PolicyLetter%2001-13.pdf.
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Subpart 110.01--Applicability

Sec.  110.01-1 General
    We received requests for information on the implementation dates
for the revised regulations. In response and to provide greater clarity
for the public, this final rule includes an amendment to Sec.  110.01-
1(b) that explains the effective date of the requirements in this rule.
The requirements implemented in this final rule will be effective 30
days after the publication of this final rule. Paragraph (b) will also
clarify that subchapter J applies only to electrical installations
contracted for after the effective date of this final rule. Existing
paragraph (c) of this section will continue to allow a vessel's
electrical installations to meet the subchapter J regulations in place
when those systems were initially installed. According to existing 46
CFR 110.01-3(a), repairs and replacements in kind must comply with
either the regulations in this subchapter or those in effect when the
vessel was built. Per Sec.  110.01-3(b), alterations and modifications,
such as re-engining, re-powering, upgrading of the main propulsion
control system, or replacing extensive amounts of cabling, must comply
with the regulations in this subchapter, including updates implemented
by this final rule. Per existing Sec.  110.01-1(c), all electrical
systems installed or under Coast Guard review prior to this date may
meet the regulations in place at the time of installation or submittal
to the Coast Guard.

Subpart 110.10--Reference Specifications, Standards, and Codes

Sec.  110.10-1 Incorporation by Reference
    We received the following comments in regard to our update of the
technical standards incorporated by reference in subchapter J in Sec.
110.10-1.
    Several commenters suggested incorporating by reference newer
editions than we had proposed to incorporate in Sec.  110.10-1. Because
of the frequent release of new editions, and the time necessary to
evaluate them and propose their incorporation, it is often impractical
to incorporate standards or new editions that publish after we issue
our NPRM. Instead, the Coast Guard considered whether the standards
proposed in the NPRM are still

sufficient and relevant to electrical engineering practices at the time
of this final rule, even if a newer edition is available. We determined
that the editions proposed in the NPRM are still sufficient and
relevant.
    Several commenters requested incorporating by reference different
standards than are referenced in Sec.  110.10-1 or proposed in the
NPRM. The suggestions included standards and codes for alternative
propulsion fuels; inspection, maintenance, and repair of equipment in
hazardous locations; and hazardous location equipment directories or
dossiers. These topics are not currently addressed in subchapter J.
Including them at this stage would impose new regulatory requirements
on vessels and facilities. This rule is intended to update the existing
regulations in subchapter J and result in quantitative and qualitative
savings for vessel owners. For this reason, standards for topics not
currently addressed in subchapter J are outside the scope of this final
rule. We may consider some of these standards in the future for
incorporation by reference following a thorough technical analysis of
the standards as well as their potential costs and benefits. Further,
proposals for new requirements on topics not already included in
subchapter J would be given additional public notice and opportunity
for comment.
    Additionally, we received specific comments on the following
standards we proposed for incorporation by reference.
    American National Standards Institute (ANSI)/UL standards: A
commenter requested that we refer to the UL standards as ANSI/UL
standards. In many of the regulatory text sections we do refer to such
standards as ANSI/UL standards, but we do not do so in the IBR section,
Sec.  110.10-1. In that IBR section, we are required to list the
standard name exactly as it appears on the cover of the standard.
    The commenter also noted that many ANSI/UL standards related to
hazardous locations replaced similar ISA standards, and suggested the
UL standards should be referenced throughout the CFR. We agree with
listing the ANSI/UL standards in addition to where we proposed to
include the ANSI/ISA standard because of their similarities in
requirements and options. In the NPRM we proposed to incorporate ANSI/
ISA 12.12.01 (2015). In this final rule we are also adding ANSI/ISA-
RP12.06.01 (2003) because it superseded a previously incorporated
standard we removed, ISA RP 12.6 (1995). These two are the only ANSI/
ISA standards that will be incorporated by reference in subchapter J
and both are active standards. Where the ANSI/ISA series of standards
are referenced in Sec. Sec.  111.105-3(b)(2), 111.106-3(b)(2), and
111.108-3(b)(2), this final rule adds the ANSI/UL series as an option
in those sections as well.
    IEEE 100 (2000): A commenter noted that the Institute of Electrical
and Electronics Engineers (IEEE) withdrew the standard IEEE 100 (2000).
IEEE 100 (2000) is only referenced in Sec.  110.15-1 regarding
electrical and electronic term definitions. We have decided to retain
it in subchapter J because the definitions are still relevant. We have
confirmed that the standard is still available for the public to
purchase despite IEEE withdrawing it. We acknowledge that a revision to
the standard is underway and we will consider updating references to
this standard in the future.
    IEEE 1580 (2010): A commenter suggested we incorporate the 2018
edition. The 2018 edition was still in the draft stage when we
published the NPRM in April 2021, and we were not able to propose draft
standards for incorporation by reference. The IEEE board approved the
IEEE 1580 (2021) on November 9, 2021, and published it on March 23,
2022, both dates after the comment period for the NPRM closed. The IEEE
1580 (2021) standard superseded the 2010 version. IEEE 1580 provides
recommended practice for marine cable use on shipboard and fixed or
floating facilities, and the 2021 edition addresses changes in changes
in technology and revisions to referenced standards since 2010. The
Coast Guard has decided that the 2010 version is still sufficient and
relevant for marine cables at the time of this final rule. However, the
public can submit equivalency requests for the 2021 edition to the
Marine Safety Center (MSC) in accordance with Sec.  110.20-1.
    IEC 60092-302:1997: A commenter noted that this standard was
superseded by IEC 60092-303-2, Electrical installations in ships--Part
302-2: Low voltage switchgear and controlgear assemblies--Marine power,
published in 2019. We have decided to retain the 1997 edition until we
can thoroughly review the 2019 edition. However, we may consider
switchgear meeting the standards in IEC 60092-302-2:2019 under the
equivalency provisions of Sec.  110.20-1.
    ISA RP 12.6:1995: We proposed in the NPRM to remove ISA RP 12.6
because ISA has withdrawn it. A commenter noted that a new standard,
ANSI/ISA RP12.06.01, has superseded ISA RP 12.6. The commenter is
correct. Because the two standards are very similar, we are replacing
the withdrawn ISA RP 12.6 standard with the new ANSI/ISA RP12.06.01
standard as suggested. This final rule incorporates by reference ANSI/
ISA-RP12.06.01:2003 in Sec.  111.105-11. ANSI/ISA-RP12.06.01 is a
recommended practice that promotes the uniform installation of
intrinsically safe systems in hazardous (classified) locations and
clarifies the requirements of Articles 504 and 505 of National Fire
Protection Association (NFPA) standard NFPA 70.

Subpart 110.25--Plan Submittal

Sec.  110.25-1 Plans and Information Required for New Construction
    A commenter noted that the proposed changes to Sec.  111.105-3
provided the option to select electrical equipment on any single vessel
to comply with NFPA 70 Articles 500-504, or NFPA 70 Article 505, or IEC
60092-502, based on either the Division or the Zone method of hazardous
location classification. The commenter suggested that we amend the plan
requirements for hazardous locations in Sec.  110.25-1 to ensure the
classification method is indicated on the plans submitted for review.
We agree with this suggestion and are incorporating it into this final
rule. The extent and classification of all hazardous locations is
already required in the existing Sec.  110.25-1(i) but clearly
indicating the method of classification, Division or Zone, is important
to ensure appropriate selection of equipment for the hazardous
location. In this final rule, we amend Sec.  110.25-1(i) to require
that the plans indicate the method of classification of the hazardous
locations in addition to the other requirements already included in
paragraph (i).

Subpart 111.10--Power Supply

Sec.  111.10-9 Ship's Service Supply Transformers; Two Required
    A commenter noted that our proposed revision to the note to Sec.
111.10-09 concerning ship's service transformers appears to contradict
the text of Sec.  111.10-09 regarding the number of transformers. We
disagree. Section 111.10-3 requires that the shipboard power supply
system on self-propelled vessels have at least two electric generating
sources. The intent of Sec.  111.10-09 is to continue this requirement
by duplicating the number of transformers that are used to supply the
ship's service distribution system. As explained in this note, the
intent is not to provide duplication of ship's service distribution
system circuits after the ship's service switchboard. This is a long-
standing position that is explained in Coast Guard guidance,
specifically

page 16 of Navigation and Vessel Inspection Circular (NVIC) 2-89,
``Guide for Electrical Installations on Merchant Vessels and Mobile
Offshore Units,'' dated August 14, 1989.\2\
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    \2\ NVIC 2-89, ``Guide for Electrical Installations on Merchant
Vessels and Mobile Offshore Drilling Units,'' is available at
https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/5ps/NVIC/1989/n2-89.pdf.
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Subpart 111.12--Generator Construction and Circuits

Sec.  111.12-11 Generator Protection
    Section 111.12-11(g) states that a ship's service generator and its
switchboard must be in the same space and states that a control room
inside the machinery casing is not considered outside the machinery
space. Paragraphs 111.12-11(g)(1) and (2) provide two arrangements that
the Coast Guard considers to meet this requirement. In other words, we
consider a switchboard room within the machinery space, containing the
overcurrent protection on the switchboard, to be satisfactory,
regardless of whether there are centralized engineering controls or
monitoring in that control room. This rule, which replaces a reference
to a ``semiconductor rectifier'' with ``semiconductor converter'' in
paragraph (g), does not substantively change these existing provisions.
A commenter asked if a control room that is an air-conditioned
switchboard room with generator controls on a switchboard, but without
centralized engineering control and monitoring, is an acceptable
control room. This question is beyond the scope of this rulemaking, but
questions regarding compliance with Subchapter J may be submitted to
the MSC.

Subpart 111.15--Storage Batteries and Battery Chargers: Construction
and Installation

    Two commenters suggested we consider incorporating by reference
IEEE 1187-2013, ``IEEE Recommended Practice for Installation Design and
Installation of Valve-Regulated Lead Acid Batteries for Stationary
Applications.'' The commenters noted that although FPUs are not
stationary, they are not ocean-going vessels either. The commenters
also noted because FPUs do not have the range of motions of a vessel,
they use valve-regulated lead acid batteries (as governed by IEEE 1187-
2013) rather than the vented lead-acid batteries covered in the NPRM's
updates to subchapter J. We understand the unique characteristics of
FPUs may require additional options and guidance. Specifically, 33 CFR
143.120(b) and CG-ENG Policy Letter 01-13 allow alternate proposals for
floating OCS facilities. System designers may submit applications to
the MSC demonstrating that a system using valve-regulated lead acid
batteries, as governed by IEEE 1187-2013, provides an equivalent level
of safety in accordance with Sec.  110.20-1. We understand this IBR
suggestion and may consider it in a future rulemaking. Further, we find
that we cannot include this suggestion in this final rule because, in
order to add the standard and those additional requirements, we would
prefer to conduct an additional analysis of alternatives and provide
the public opportunity to review and comment on its addition.

Subpart 111.30--Switchboards

Sec.  111.30-5 Construction
    In the NPRM, we proposed replacing the existing reference to
section 8.3 of IEEE 45-2002 in Sec.  111.30-5(a)(1) with a reference to
section 6 of the more recent IEEE 45.7-2012. A commenter noted section
6.3.3 of IEEE 45.7 requires a steering gear breaker trip set to not
less than 200 percent of locked rotor current. This conflicts with
Sec.  58.25-55(a)(2), which requires a trip set point between 175 and
200 percent of locked rotor current. We agree that the change we
proposed in the NPRM would present an unintended conflict with other
existing regulations. The intent of Sec.  111.30-5 is to address
switchboard construction, not overcurrent protection for specific
systems, so when reviewing IEEE 45.7 we did not observe that the
standard added a requirement for the steering gear circuit overcurrent
protection. We did not intend the NPRM to propose a change to the
existing requirements for steering gear circuit overcurrent protection.
For this reason, in Sec.  111.30-5(a)(1) of this final rule, we are
incorporating section 6 of IEEE 45.7-2012, excluding section 6.3.3.
    A commenter asked for clarification of the proposed Sec.  111.30-
5(c) regarding switchboard construction, which stated that ``[t]he
interchangeability and compatibility of components complying with both
IEEE and IEC cannot be assumed.'' We agree this proposed paragraph (c)
could have caused confusion. Our intent in this paragraph was to
discourage the mixing of acceptable standards in a manner that could
result in a potentially unsafe switchboard. We recognize that complying
with and enforcing this relatively vague requirement would be
difficult, and we have accordingly deleted it in this final rule.
Switchboards should be constructed in accordance with the standards
incorporated by reference in subpart 111.30.
Sec.  111.30-19 Buses and Wiring
    In the NPRM, we proposed replacing the existing reference to
section 7.10 of IEEE 45-1998 in Sec.  111.30-19(a)(1) with a reference
to section 5.10 of the more recent IEEE 45.7-2012. A commenter noted
section 5.10 of IEEE 45.7-2012 appears to have less strict requirements
for generator bus sizing and could be interpreted to not require sizing
to support overload operation of the generator for a sustained period.
We disagree. The requirements are very similar, and IEEE 45.7-2012
reflects the latest guidance on bus sizing.
Sec.  111.30-25 Alternating-Current Ship's Service Switchboards
    A commenter suggested that the generator field rheostat (manual
voltage controller) currently required by Sec.  111.30-25(c)(1) was of
limited value and is not required by other regulatory bodies. We
understand this suggestion and may consider it in a future rulemaking.
In order to remove the requirement, we would prefer to conduct an
additional analysis of alternatives and provide the public opportunity
to review and comment on its removal. In the meantime, however, system
designers may submit switchboards with alternative instrumentation that
provides an equivalent level of safety to the MSC in accordance with
Sec.  110.20-1.

Subpart 111.33--Power Semiconductor Converter Systems

    In the NPRM, we proposed changing the heading of subpart 111.33
from Power Semiconductor Rectifier Systems to Power Semiconductor
Converter Systems and changing references to rectifiers to converters.
This proposed change aligned with general industry practice of using
the term converter as it is more general than rectifier. This subpart
applies to rectifiers (alternating current (AC) to direct current
(DC)), inverters (DC to AC), and other power converters. Additionally,
in the NPRM we proposed updating the standards incorporated by
reference in this subpart to more recent editions. A commenter noted
that <IP_ADDRESS> of IEEE 45.2-2011, which would replace 10.20.12 of IEEE
45-2002, covers rectifiers. The commenter is correct in this regard.
However, <IP_ADDRESS> of IEEE 45.2-2011 provides the required nameplate
data, and the Coast Guard determined the requirements of this section
are also generally applicable to

any power semiconductor converter system.
    In addition, in the NPRM, we proposed replacing references
throughout subpart J to ``semiconductor rectifier (SCR)'' with
references to ``semiconductor converter''. However, upon further review
following the NPRM's publication, we realized that some instances of
this amendment were inadvertently not included in the amendatory
language for the NPRM. We have updated the amendatory language in this
final rule to include these missed instances of ``converter'' in this
final rule at Sec. Sec.  111.33-1 and 111.33-3(b).

Subpart 111.40--Panelboards

Sec.  111.40-1 Panelboard Standard
    A commenter noted Section 9.10 of IEEE 45.1, proposed for
incorporation by reference in the NPRM, includes multiple sub-sections
but only subsection 9.10.1 is directly applicable to panelboards. The
commenter suggested updating the reference to only include this
subsection. We agree, and in the interest of greater precision we
revise Sec.  111.40-1 in this rule to only reference subsection 9.10.1.

Subpart 111.50--Overcurrent Protection

Sec.  111.50-3 Protection of Conductors
    A commenter noted that currently neither Sec.  111.50-3 nor Sec.
111.20-15 clearly addresses NFPA 70--National Electric Code (NEC)
requirements for transformer secondary conductor protection and
suggested that Sec.  111.50-3 should include or cite to NEC
240.21(C)(1) requirements. NEC 240.21(C)(1) explicitly states that
primary overcurrent protection is insufficient to protect secondary
conductors of delta-wye transformers. In the NPRM, we did not propose
substantive changes to these two sections beyond incorporating the more
recent editions of the standards. Adding the requirements at NEC
240.21(C)(1) to Sec.  111.50-3 would require additional analysis and
opportunity for the public to review and comment. Nevertheless, we may
consider incorporating NEC Article 240, which provides guidance for
transformer conductor overcurrent protection, in Sec.  111.50-3 in the
future.
    A commenter also said that neither Sec.  111.50-3 nor Sec.  58.25
currently address DC steering gear motors. The commenter also said that
both Sec. Sec.  111.50-3 and 58.25 are silent on the use of fuses for
overcurrent protection in these systems. The commenter suggested that
we remove the cross-reference to 46 CFR 58.25 and revise Sec.  111.50-3
to align with ABS SVR 4-8-2/9.17.5 standards on DC steering gear motors
and prohibiting fuses. We disagree with the suggested change. Paragraph
58.25-55(a)(1) specifically requires DC steering gear motors to be
protected from overcurrent by a circuit breaker at the switchboard.
This section does not list fuses as an acceptable means of overcurrent
protection. Vessel owners and operators must ensure DC steering gear
motors are protected from overcurrent by circuit breakers unless an
equivalent arrangement is approved by the MSC in accordance with Sec.
110.20-1. We did not propose substantive changes to these two sections
in the NPRM beyond incorporating the more recent editions of the
standards already incorporated by reference in Sec.  111.50-3. However,
we will consider updating our steering gear motor regulations in the
future following a review of the latest advances in steering gear power
and control systems.

Subpart 111.51--Coordination of Overcurrent Protection Devices

Sec. Sec.  111.51-1 Purpose and 111.51-5 Protection of Vital Equipment
    In the NPRM, we proposed to revise Sec.  111.51-1 to set out a
broad introductory discussion of the requirements for coordination of
overcurrent protection devices that is based on the recommendations in
IEC 60092-202:2016 and not substantively different from the existing
Sec.  111.51-1 that it replaced. A commenter noted the term
``continuity of service'' as used in the proposed revisions to Sec.
111.51-1, as well as in the current text of Sec.  111.51-1, is not
defined and could be interpreted in a number of ways. Additionally, the
same commenter also recommended editing Sec.  111.51-5(b)(2) to allow
for cases where multiple protective devices are directly in series due
to the arrangement of the power system and vendor equipment supply or
requirements for disconnecting device. Alternatively, they suggested we
define that a protective device refers to a set of one or more
protective devices which protect the same segment of the electrical
system. The commenter was concerned the section could be interpreted to
require explicit coordination between protective devices within the
same feeder or branch circuit.
    It is not the intent of this final rule to substantively alter our
existing regulations for coordination of overcurrent protection
devices. Continuity of service is defined in IEC 60092-202:2016 as a
``condition where, after a fault in a circuit has been cleared, the
supply to the healthy circuits is re-established.'' More importantly,
the goal of overcurrent protection coordination is to minimize the
impact of short circuits on vital equipment as explained in Sec. Sec.
111.51-1 and 111.51-5. If multiple protective devices are in series, it
is incumbent on the system designer to demonstrate the devices satisfy
the intent of overcurrent protection coordination. Additionally,
proposing a unique definition for protective devices is not a preferred
option where the definition is widely used and defined by a standard.
We encourage the use of established industry standards and definitions.
If there are any vessel or system specific arrangements being proposed
for Coast Guard certificated vessels, their equivalency with this
subpart can be demonstrated to the MSC in accordance with Sec.  110.20-
1. We made no changes from the proposed rule in Sec.  111.51-5.

Subpart 111.60--Wiring Materials and Methods

Sec.  111.60-3 Cable Application (Existing)
    In the NPRM, we proposed to delete this section because it is
unnecessarily prescriptive. In its place, we proposed that regulated
entities would consult the current and proposed cable construction
standards in proposed new Sec.  111.60-1 for the application of
specific types of cable. A commenter expressed concern that cable for
specialized applications, such as scientific research instruments and
passenger ferry Wi-Fi networks, is sometimes not available or cost-
prohibitive to meet the fire test requirements. The commenter
recommended retaining Sec.  111.60-3 largely as written. Based on our
research for available products, the Coast Guard has determined that
common types of cables that comply with the standards in Sec.  111.60-1
are available and provide the safest option for U.S. vessels.
Additionally, our research indicates the cost will be comparable to all
other cable suitable for marine applications. Accordingly, this final
rule retains the amendment from the NPRM to remove Sec.  111.60-3. We
will consider other cable on a case-by-case basis in accordance with
the equivalency provisions of Sec.  110.20-1.
Sec.  111.60-4 Minimum Cable Conductor Size
    A commenter noted we did not propose changing the required minimum
conductor size in this section of 0.82 square millimeters (mm\2\) and
2.1 mm\2\ for control and power cable, respectively. The commenter
explained that vessels inspected under the ACP

have a lesser conductor size requirement. For example, ABS MVR 4-8-2/
7.7.2 allows smaller minimum conductor sizes of 0.5 mm\2\ and 1.5 mm\2\
for control and power cable respectively. (The metric dimensions given
in this section are metric conversions of the standard American Wire
Gauge sizes rather than standard metric wire sizes suggested by this
commenter and used in the ABS rule.) The commenter recommended we
decrease the metric size requirements to match the requirements
applicable to ACP vessels because they believed doing so would
eliminate the need to excessively oversize metric cable to meet rules
that are currently written to align with common AWG sizes. Vessels
enrolled in the ACP comply with a comprehensive set of engineering
standards and an inspection regime that collectively provide a level of
safety equivalent to complying solely with the regulations in 46 CFR
even though the requirements are not identical. As the commenter noted,
we did not propose substantive changes to this section in the NPRM and
do not intend to change it in the final rule. Allowing smaller minimum
conductor sizes on all vessels regulated by subchapter J is a less
stringent requirement that we may consider in the future following
additional analysis and opportunity for public comment. Presently, the
metric conductor size requirements in this section are still considered
reasonable and safe, and we made no additional changes based on this
recommendation.
Sec.  111.60-6 Fiber Optic Cable (Existing)
    In the NPRM, we proposed to remove current Sec.  111.60-6 because
fiber optic cable that complies with Sec.  111.60-1 is now available. A
commenter contended that such fiber optic cable is not readily
available. We agree that it may be difficult to find fiber optic cable
to meet the standards in Sec.  111.60-1 and have decided to forgo the
proposed change to remove Sec. Sec.  111.60-2 and 111.60-6. This final
rule does not remove existing Sec. Sec.  111.60-2 and 111.60-6, or the
cross references to Sec. Sec.  111.60-2 and 111.60-6 within the
applicable list of standards incorporated by reference in Sec. Sec.
110.10-1(j)(14), 110.10-1(q)(23), 110.10-1(k)(34), 110.10-1(k)(35), and
110.10-1(j)(13), where they were already included. However, in this
final rule we have updated the standards mentioned within Sec. Sec.
111.60-2 and 111.60-6 to conform with updates to standards incorporated
by reference within this subchapter.
Sec.  111.60-11 Wire
    A commenter noted the reference to Section 5.7 of IEEE 45.8-2016 in
Sec.  111.60-11 and pointed out that this section does not address
wire. We agree and have removed the reference to Section 5.7 of IEEE
45.8 from this section because it is not related to the topic of Sec.
111.60-11. The commenter also suggested that wire constructed to a
recognized commercial standard or military specification MIL-W-16878 or
MIL-W-22759, with particular attention to the effects of vibration,
moisture, ambient temperature, and other adverse conditions such as
contaminants and oils that may be present should be acceptable. We
agree in principle. Section 111.60-11(c) provides that wire must the
requirements set out in one of three standards for wire and concludes
with ``or equivalent standard.'' System designers choosing an
alternative standard they believe equivalent, such as that described by
the commenter, should discuss it with the MSC. There are too many
relevant standards to incorporate them all. Instead, we have decided to
offer three standards as guidance for acceptable wire requirements. We
will consider equivalency requests in addition to the standards we
incorporate by reference.

Subpart 111.70--Motor Circuits, Controllers, and Protection

Sec.  111.70-3 Motor Controllers and Motor-Control Centers
    A commenter noted that the proposed regulatory text in the NPRM
implied that we were making changes to Sec. Sec.  111.70-3(c)(2) and
(d)(1)(v) but the proposed regulatory text as presented in the NPRM was
unchanged from existing regulatory text. This observation is correct.
We erroneously included these sections in the NPRM's amendatory
instructions, but we did not actually propose any changes. No changes
were intended. This final rule does not include any amendments to the
regulatory text at Sec. Sec.  111.70-3(c)(2) and (d)(1)(v).

Subpart 111.75--Lighting Circuits and Protection

Sec.  111.75-17 Navigation Lights
    In the NPRM, we proposed incorporating EN 14744 in Sec.  111.75-17
as an additional alternative standard for navigation lights. Currently,
UL 1104 is the only standard incorporated by reference in Sec.  111.75-
17. One commenter suggested that, since UL 1104 is no longer supported
by UL and does not address electromagnetic interference or light-
emitting diode (LED) light lifecycle degradation, it should be removed
from this section and EN 14744 should be adopted as the sole standard
for all navigation lights, including AC- and DC-powered lights,
incandescent and non-incandescent lights, lights on all vessel types
and sizes, and lights on inspected and non-inspected vessels.
    We disagree with the suggestion to remove UL 1104. Several years
ago, UL transferred responsibility for the maintenance of UL 1104 to
the American Boat and Yacht Council (ABYC). Prior to this rulemaking,
UL 1104 was the only standard for the construction and testing of
navigation lights incorporated by reference in subchapter J, and it is
currently being used by several navigation light manufacturers. Lights
manufactured and certified to UL 1104 meet the current luminous
intensity and colorimetric requirements of the International
Regulations for Preventing Collisions at Sea, 1972 (1972 COLREGS).
Additionally, the environmental performance requirements contained in
UL 1104 are similar in intent to those in EN 14744. For these reasons,
we are not removing UL 1104 at this time.
    Additionally, we cannot incorporate by reference EN 14744 for all
light and vessel types as suggested. The scope of this rule is limited
to subchapter J. The navigation light requirements in subchapter J
generally apply to larger, inspected commercial vessels. The
requirements for navigation lights on certain smaller, inspected
commercial vessels, uninspected commercial vessels, and recreational
vessels are contained in other subparts of the CFR. We did not propose
amendments to those subparts in the NPRM, and because of this we cannot
incorporate by reference EN 14744 for all light and vessel types.
    Since UL transferred UL 1104 to ABYC we have worked with ABYC and
other navigation light stakeholders to develop an updated navigation
light standard to replace UL 1104. This standard, ABYC C-5,
Construction and Testing of Electric Navigation Lights, published in
July 2021, too late for inclusion in the NPRM and after the NPRM
comment period closed. ABYC C-5 is applicable to all light and vessel
types and addresses both electromagnetic interference and LED light
lifecycle degradation. We may address the incorporation by reference of
ABYC C-5, a broader incorporation by reference of EN 14744, other
potential navigation light standards, and navigation light requirements
for all vessel types in a future, broader, Coast Guard proposal.

Subpart 111.83--Shore Connection Boxes

Sec.  111.83-7 High Voltage Shore Connection
    A commenter noted that proposed new Sec.  111.83-7 only applies the
requirements of IEC/IEEE 80005-1:2019 to vessels required by law to
have high voltage shore connections (HVSCs), and recommended removing
that limitation. The Coast Guard agrees the proposed limitation to only
vessels that were required by state or local law to connect to HVSC
would have created unnecessary confusion. This section does not require
compliance with IEC/IEEE 80005-1:2019; it is a recommendation for best
practices and additional safety. For vessels that connect to electrical
shore power using an HVSC, we recommend complying with IEC/IEEE 80005-
1:2019 regardless of whether it is required by a state or local
jurisdiction. For this reason, we have removed the limitation that
Sec.  111.83-7 would only apply to vessels required by law to have
shore power and instead provide this section as a recommended standard
for all vessels that use an HVSC.
    Another commenter requested that the ABS Guide for High Voltage
Shore Connection be considered for incorporation by reference as an
alternative standard for HVSCs. We have not incorporated this guide.
IEC/IEEE 80005-1:2019, which is incorporated by reference in the new
Sec.  111.83-7, is an international voluntary consensus standard that
provides an acceptable baseline recommendation, while the ABS Guide for
High Voltage Shore Connection is a classification society guide.
Although the ABS Guide for High Voltage Shore Connection may be a
satisfactory alternative for consideration in an equivalency request,
it is not necessary to list a classification society guide in the
regulations when an international voluntary consensus standard is
available. The National Technology Transfer and Advancement Act of 1995
(15 U.S.C. 272 note) directs Federal agencies to use voluntary
consensus standards in their regulatory activities unless doing so
would be inconsistent with applicable law or otherwise impractical.

Subpart 111.99--Fire Door Holding and Release Systems

Sec.  111.99-5 General
    The NPRM proposed updating the existing citation in Sec.  111.99-5
to reflect a more current edition of the International Convention for
Safety of Life at Sea, 1974 (SOLAS), Sixth edition. A commenter noted
that SOLAS II-2/<IP_ADDRESS>.5 includes a number of paragraphs that include
requirements for safe functioning of the fire door release system. The
commenter suggested that we expand Sec.  111.99-5 to include these
additional paragraphs in II-2/<IP_ADDRESS>.5 beyond that which was
referenced in the NPRM. We understand that SOLAS contains additional
requirements for fire doors. Vessels that comply with SOLAS must meet
these requirements, but requiring all vessels that must comply with
Subchapter J's requirements meet these standards would place regulatory
requirements on these vessels without providing appropriate opportunity
for public notice and comment. Accordingly, we did not incorporate this
suggestion at this time.

Subpart 111.105--Hazardous Locations

    One commenter suggested we remove the Division system for
classification of hazardous locations from subchapter J. The commenter
said that compliance would be simpler if only the Zone system was
accepted. We disagree. This is an established system used extensively
in North America and removing the Division system would adversely
affect many equipment manufacturers.
    Another commenter requested we incorporate by reference American
Petroleum Institute (API) standards API RP 14FZ and API RP 500, and
IEEE 1187-2013. As we discussed in regard to a comment on subpart
111.15, we are not inclined to incorporate IEEE 1187 because it
contains additional requirements beyond what we believe necessary to
incorporate at this time. API RP 14FZ and API RP 500 are already
incorporated or will be incorporated in a very limited scope, which we
have determined to be a reasonable level at which to require these
standards.
Sec.  111.105-3 General Requirements and System Integrity
    The intent of Sec.  111.105-3 is to ensure all electrical equipment
installed in a hazardous location is appropriate for the location. One
commenter suggested that acceptable electrical components may be
combined in a manner that may produce an assembly that can ignite a
hazardous atmosphere and that this may not be caught in after-
installation inspections. The commenter suggested several standards to
address this concern, such as ANSI/UL 698A, IEC TS 60079-46, ANSI/UL
508A, and UL 2011. Additionally, the commenter suggested that this rule
address the importance of assembly verification throughout the
equipment lifecycle from design to installation. Assembly verification
throughout the process is an important issue for system designers, but
it is outside the scope of this rulemaking. Applicants must include
assemblies of electrical equipment in plans and installation details in
their request for Coast Guard review in accordance with Sec. Sec.
110.25-1(i) and (j). The Coast Guard then reviews the plans and
installation details to ensure safe assembly in accordance with these
standards.
    Several commenters requested clarification of the phrase ``and not
in combination in a manner that will compromise system integrity or
safety,'' proposed in the NPRM for new Sec.  111.105-3(c).
Additionally, commenters suggested that we reorganize Sec.  111.105-3
to better separate equipment selection standards and installation
requirements. Since its initial adoption in 1996, our intentions in
Sec.  111.105-5 (which we had proposed to move into Sec.  111.105-3)
have been to ensure that proper and safe equipment is used in hazardous
locations and to allow safe combinations of equipment complying with
either NFPA 70 (Division system) or the IEC 60079 series of standards
(Zone system).\3\ The phrase in question, located in Sec.  111.105-3(c)
in this final rule, ensures such systems are carefully designed because
the methods of classification of hazardous locations can differ. When a
location is subject to two classification systems, it may have two
different classifications. For example, a specific cargo oil tank may
be classified as a Class I, Division 1, location under one system and
Zone 0 under the other. In this example, electrical equipment approved
for Class I, Division 1 (intrinsically safe) or approved for Zone 0
(ia) may be installed in the cargo tank.
---------------------------------------------------------------------------

    \3\ ``Electrical Engineering Requirements for Merchant Vessels''
interim rule (61 FR 28284, June 4, 1996).
---------------------------------------------------------------------------

    In the NPRM we proposed to combine Sec. Sec.  111.105-3 and
111.105-5 into Sec.  111.105-3 to be consistent with Sec. Sec.
111.106-3 and 111.108-3. This created confusion among commenters, and
we have decided to revise our approach to proposed Sec.  111.105-3.
Instead, we have renumbered the proposed Sec.  111.105-7 as Sec.
111.105-3 and amended it to be more consistent with Sec. Sec.  111.106-
3 and 111.108-3 by adding notes after new paragraphs 111.105-3(b)(1)
and (b)(2). This change better clarifies the appropriate guidance for
using Zone equipment in Division-designated spaces or using Division
equipment in Zone-designated spaces.

Additionally, as mentioned earlier, we will also require in Sec.
110.25-1(i) that applicants clearly indicate the hazardous location
method of classification, Division or Zone, in their plan submissions.
    One comment suggested that it was more appropriate to incorporate
by reference Clause 7 rather than Clause 6 of IEC 60092-502 in Sec.
111.105-3(b). We disagree. Clause 6 concerns the requirements of
electrical equipment in hazardous areas while Clause 7 addresses
installation of electrical equipment in hazardous areas. The intent of
Sec.  111.105-3(b) is to prescribe the standards for electrical
equipment intended for hazardous areas (locations), not specifically
installation. This is the same as Sec.  111.108(a)(3). It was not our
goal for the proposed modifications to Sec.  111.105 to substantively
change the standards fundamental to equipment selection. In the
existing regulations, in accordance with Sec.  111.108-1(b), all
vessels could use the standards specified in 46 CFR Subpart Sec.
111.108. Revisions to Sec.  111.105 are intended to make this clearer.
    One comment noted that for electrical installations on mobile and
fixed offshore units the proposed requirements only reference Clause 8
of IEC 61892-7. The commenter also noted that Clause 8 excludes
guidance on cables and conduits and Clause 9 of IEC 61892-7 is for
cables and wiring systems. This is correct. We intentionally did not
reference Clause 9 for cables and wiring systems. Prior to this
rulemaking, we previously incorporated Clause 6 of IEC 61892-7:2007.
Clause 6 addresses electrical equipment in hazardous areas, but not
wiring or cable systems. We proposed to incorporate by reference the
more recent Clause 8 of IEC 61892-7:2019. Clause 8 similarly addresses
electric equipment by referencing Clause 5 of IEC 60079-14:2013. It was
not our intent to add wiring and cabling system requirements to Sec.
111.105-3. The requirements for wiring and cable systems in hazardous
locations are in Sec.  111.105-17.
    One commenter noted that both Clauses 8 and 9 of IEC 61892-7
reference IEC 60079-14, Electrical installations design, selection, and
erection, and suggested that we should incorporate IEC 60079-14 by
reference. We disagree with the suggestion. Since we incorporated by
reference IEC 61892-7:2007 in 46 CFR subchapter J, the standard has
evolved and been updated twice. In 2014, the IEC 61892-7 requirements
for installations in hazardous area were rewritten based on the
requirements of IEC 60079-14:2013. In the latest edition, 2019, IEC
61892-7 was completely rewritten and references are, to the extent
possible, made to IEC 60079-14:2013 and to other relevant standards. At
this time our intent is to only apply IEC 60092-14:2013 as it is
referenced in Clause 8 of IEC 618792-7:2019. We describe Clause 8 in
the previous paragraph. Despite the commenter mentioning Clause 9 of
IEC 61892-7:2019, we did not propose to incorporate it in the NPRM. We
already address the cable and wiring requirements using standards we
deem sufficient in Sec.  111.105-17. It is commonplace for standards to
reference other standards, but incorporating every standard simply
because it is cross-referenced would cause us to incorporate more
standards than are reasonably necessary to convey the relevant
requirements. A broader incorporation by reference of IEC 61892-7:2019
would require additional regulatory analysis and an additional
opportunity for the public to review and comment.
Sec.  111.105-28 Internal Combustion Engines
    A commenter said that Sec.  111.105-28 states ``Internal combustion
engines installed in Class I Divisions 1 and 2 (Zones 1 and 2),'' but
there is no direct equivalency between Class I Division 1 and Zone 1 as
Class I Division 1 covers equipment in Zone 0 as well. The commenter
suggested that references to Class I Divisions (1 and 2) and Zones be
removed from the section. We disagree with this suggestion. Currently,
Sec.  111.108-1(b) allows U.S. Mobile Offshore Drilling Units (MODUs),
floating OCS facilities, and vessels other than Offshore Supply Vessels
(OSVs) regulated under 46 CFR subchapter L and U.S. tank vessels that
carry flammable and combustible cargoes, to comply with ASTM F2876 per
Sec.  111.108-3(g). Our purpose in changing Sec.  111.105 is to improve
the consistency of the regulations related to hazardous areas in
Sec. Sec.  111.105, 111.106, and 111.108. It does not change the
requirements. Although we agree with the commenter's assertion that
Class I Division I may also cover equipment in IEC Zone 0, internal
combustion engine installations are generally prohibited for use in
shipboard IEC Zone 0 areas.
    A commenter noted that engines may be certified by the manufacturer
to ASTM F2876 and its maximum surface temperature requirements. The
commenter also noted that ASTM F2876 does not address different testing
requirements from Zone 1 and Zone 2 applications. The primary purpose
of ASTM F2876 is determining the maximum operating temperature of the
engine, in order to ascertain the suitability of the engine
installation in hazardous areas associated with the autoignition
temperature of various flammable cargoes. An independent laboratory
must certify all electrical equipment associated with the engine
installation. Although ASTM F2876 contains other requirements in
addition to temperature measurement, the references to EN 1834-1 within
ASTM F2876 are recommendations only.
Sec.  111.105-50 Alternative Standard to the Classification of
Hazardous Locations Requirements of This Subchapter
    A commenter noted we proposed in the NPRM to incorporate IEC 60092-
502 without also incorporating the Coast Guard's interpretations and
additional requirements, issued in April 2009, which we maintain on the
Coast Guard's website for the ACP.\4\ The commenter did not offer an
opinion or recommendation on this proposal, but asked us to clarify if
these requirements in the IEC 60092-502 Supplement would be obsolete
when we incorporate IEC 60092-502:1999. The intent of these
interpretations and supplemental requirements was for vessels in the
ACP to achieve equivalency with the regulations in 46 CFR. The Coast
Guard has determined that IEC 60092-502, even without these
interpretations and supplemental requirements, is a satisfactory
alternative method for the classification of hazardous locations. When
using IEC 60092-502 to classify hazardous locations, vessels no longer
need to comply with our IEC 60092-502 Supplement issued in April 2009.
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    \4\ See U.S. Coast Guard Interpretation: IEC 60092-502:1999
Supplement at https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/5ps/Alternate%20Compliance%20Program/iec60092-502sup.pdf.
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    A commenter said that our proposed incorporation by reference of
IEC 60092-502:1999 as an alternative method for classification of
hazardous location, while also referencing Sec. Sec.  32.60-20(c) and
38.20-10, resulted in conflicting ventilation requirements. We agree
that they can be conflicting. Unfortunately, existing U.S. and
international requirements for cargo pump room ventilation are
different. Sections 32.60-20(c) and 38.20-10 both require an air change
every 3 minutes (20 air changes per hour) while Clause 8.1.3 of IEC
60092-502:1999 requires an air change every 2 minutes (30 air changes
per hour). We intend for IEC 60092-502:1999 to be an alternative to
existing regulations. At this time we are not changing 46 CFR
subchapter D, including Sec. Sec.  32.60-20(c) and 38.20-10,

nor modifying IEC 60092-502. System designers choosing to use IEC
60092-502:1999 for classification of hazardous locations must follow
the standard. However, we are revising Sec.  111.105-50(c) from what
was proposed in the NPRM to clearly state when 30 air changes per hour
are required. Specifically, if IEC 60092-502:1999 is used, cargo
handling rooms and other spaces where hazardous location classification
is dependent upon ventilation must have mechanical ventilation capable
of at least 30 air changes per hour, based upon the gross volume of the
space.

Subpart 112.05--General

Sec.  112.05-5 Emergency Power Source
    Section 112.05-5(a) requires that an emergency power source have
the capacity to simultaneously supply all loads connected to it. To
further clarify this, in the NPRM we suggested adding the phrase ``at a
unity (1.0) service factor.'' This simply means the emergency power
source must be sufficiently sized to operate all loads at their full
rated capacity.
    A commenter requested we modify the required capacity of the
emergency power source with a phrase such as ``with due regard being
paid to such services as may have to be operated simultaneously.'' They
stated that their proposed change would allow use of emergency
generators that are more closely sized to the loads that would be
needed in an emergency. We disagree with the commenter's proposed
change. It would change the intent of the existing regulation by
allowing more discretion and ambiguity than a specific load capacity
measurement. In the interest of providing a clear discernable standard
that we considered safe, we will proceed with requiring the unity 1.0
service factor as proposed in the NPRM.
    In table 1 to Sec.  112.05-5 footnote 2, we are replacing the
reference to Sec.  111.93 with a reference to Sec.  58.25-65 because we
moved the requirements in Sec.  111.93 to Sec.  58.25-65 in a previous
rulemaking (60 FR 24776, May 10, 1995). Although we did not include
this amendment in the NPRM, this is a conforming edit that will not
have an impact on the existing emergency power requirements.
Sec.  112.05-7 Use of Emergency Generator in Port
    A commenter noted that existing Coast Guard policy regarding in
port use of the emergency generator requires that a qualitative failure
analysis (QFA), design verification test procedure (DVTP), and a
periodic safety test procedure (PSTP) be submitted for review, but the
proposed Sec.  112.05-7 did not have this requirement. This is correct.
The requirements for these documents are contained in 46 CFR subchapter
F Subpart 61.40. Based on this subpart, an emergency generator intended
to meet Sec.  112.05-7 for use in port would be required to submit a
QFA, DVTP, and PSTP for review. We do not see the need to duplicate
this requirement in Sec.  112.05-7.
    A commenter said we could require more comprehensive alarms in
Sec.  112.05-7(c) and requested that, at a minimum, we consider
clarifying the alarms and shutdowns required versus the shutdowns
allowed or disallowed. We understand the commenter's intent and request
for more specific information, but this regulation provides the
baseline requirements. We do not agree with revising the regulation to
require additional alarm regulations at this time because we have
determined that the baseline alarm requirements are still adequate.
    A commenter noted that the proposed regulations regarding in-port
use of the emergency generator at Sec.  112.05-7(c) require the vessel
be equipped with displays and alarms in the centralized control station
and alarm monitoring at the engineers' quarters. The commenter pointed
out that not all ships have a centralized control station or alarm
summary panels in the crew's quarters. These regulations set the
baseline requirements for in-port use of the emergency generator. If a
system designer cannot meet the requirements due to unique ship
characteristics, the designer may propose equivalent arrangements to
the MSC in accordance with Sec.  110.20-1. Our intent for these alarm
location regulations is to require alarms both where the emergency
generator is normally controlled and where crew would normally be
located in port.
    Additionally, two commenters noted that the NPRM did not discuss
arrangements for feedback to power the vessel's main switchboard for
habitability services and any special load analysis considerations or
interlocks requirements for paralleling with main generators. Following
our review, we find that there is not a need to include provisions on
these points because the existing Sec.  112.05-3(c) and the new Sec.
112.05-7(g) both address use of the emergency generator to feedback to
non-emergency loads and require either disconnection or automatic load
shedding of these loads before the emergency generator is overloaded.
    Another commenter was concerned that Sec.  112.05-7(e) appeared to
be describing requirements for breaker coordination to main services
while using the emergency generator in port. This is true, and this
coordination is not a new requirement. Subpart 111.51 requires
coordinated protection and selective operation of overcurrent
protective devices for all potential plant configurations, including
this situation. Section 112.05-7(e) clarifies that in port use of the
emergency generator is one of the configurations requiring coordination
of overcurrent devices in accordance with Sec.  111.51-5(a). Per the
requirements of this rule, the power supply circuits for the use of an
emergency generator in port must be arranged and protected to ensure
that any electrical fault (except for the emergency generator and the
emergency switchboard) will not affect the operation of the main and
emergency services. The commenter was concerned this requirement could
be interpreted to require full breaker coordination, which they believe
is not feasible on many vessels with large distribution breakers from
the main switchboard not designed to coordinate with a small power
source such as the in-port generator. The commenter requested we remove
references to protecting the main power system while using emergency
generator in port from these regulations, noting that the intent of the
rule is to ensure the availability of the emergency power system if it
is being used as the power source while in-port. We understand the
commenter's concerns, but, as explained in Section V.E, this provision
has been accepted by IMO since 2005 and is similarly addressed in
classification society rules. It is true that many of the provisions in
this section are aimed at ensuring the availability of the emergency
generator in port, but it is also important that the power circuits for
the main distribution system are appropriately protected when powered
by the emergency generator. We recognize that full coordination may not
always be possible because of the large variation in short currents due
to different operational conditions, but the coordination study must
demonstrate main power system circuits connected to the emergency
generator in port are adequately protected against short circuit. For
these reasons we did not make any changes to the regulatory text
originally proposed for Sec.  112.05-7.

Subpart 112.15--Emergency Loads

Sec.  112.15-1 Temporary Emergency Loads
    As provided in the NPRM, in Sec.  112.15-1 we will now require an
engineer's assistance-needed alarm as a

required temporary emergency load. A commenter correctly noted that
adding the alarm as a temporary emergency load meant that it would also
be a final emergency load. This is correct. In accordance with Sec.
112.15-5(a), temporary emergency loads are also final emergency loads.

Regulatory Analysis Comments

    A commenter asserted that table 3, ``Affected U.S.-Flagged Vessel
Population That Complies with 46 CFR Subchapter J,'' on page 21462 of
the NPRM, does not provide enough clarity to determine whether floating
OCS facilities are excluded or included under the vessel count for
``Cargo and Miscellaneous Vessels.'' The commenter also encouraged the
Coast Guard to make changes to the Marine Information for Safety and
Law Enforcement (MISLE) database and Coast Guard documentation to
ensure this and future rulemakings clarify whether floating OCS
facilities are included or excluded.
    Another commenter expressed a concern regarding table 3, suggesting
that, despite what may be currently listed in MISLE, the latest tally
of U.S.-flagged MODUs is less than 5, and likely comprises only the
Helix Q4000 and Enterprise Offshore Drilling's EOD 201, and possibly
the Spartan Rigs 202 and 303. The commenter suggested we revise table 3
of the proposed rule to read ``<5'' to more accurately reflect the
scope of subchapter J's application to U.S.-flagged MODUs.
    We agree with these commenters' assertions that we incorrectly
counted the number of Cargo and Miscellaneous Vessels. Our MISLE
database listed floating production systems as being inspected under
Title 46 of the CFR, subchapter I-A. This is incorrect. As a result, we
overstated the number of MODUs in the regulatory analysis (RA) for the
proposed rule, which lowered the population of vessels in the ``Cargo
and Miscellaneous Vessels'' category for the final rule. After further
analysis, we revised the population of MODUs to one: the Helix Q4000.
This is the only MODU in our MISLE database. Therefore, the number of
MODUs for the final rule is one because we incorrectly classified the
rest based on the subchapter inspection field in MISLE. We added the
population of 41 floating production systems in our MISLE database to
the final rule RA's category of ``Cargo and Miscellaneous Vessels''
inspected under subchapter I, which we present in table 4 of the RA.
The number of vessels in this category increased from 576 in the
proposed rule to 617 in the final rule. Because we updated the entire
vessel population for this final rule, the total number of vessels
increased from 5,570 in the proposed rule to 5,602 (see table 4).

V. Discussion of the Rule

A. Revisions to Sec.  110.10-1 Incorporation by Reference

    The standards that are incorporated by reference in subchapter J
are listed in Sec.  110.10-1. With this rule, the Coast Guard updates
the technical standards to reflect more recent editions of the
standards available to the public. We encourage the use of these
updated standards because they reflect the best available technologies,
practices, and procedures that are recommended by consensus bodies and
other groups with experience in the industry. As the baseline upon
which other standards, rules, and equivalency requests are evaluated,
it is important that subchapter J incorporates up-to-date references.
    We incorporate by reference the class rules of ABS, in particular,
in multiple locations within subchapter J and throughout 46 CFR Chapter
I. It is important to note that while these rules set the regulatory
baseline or standard for specific engineering systems and equipment,
the Coast Guard also designated several other authorized classification
societies in accordance with 46 CFR part 8. These classification
societies are listed on the Coast Guard website.\5\ The Coast Guard
authorized the listed classification societies to perform certain
functions and certifications using their respective class rules on
vessels enrolled in the ACP. Vessels not enrolled in the ACP may
propose using the class rules of an authorized classification society
as an alternative to the ABS class rules incorporated by reference for
particular engineering systems and equipment in accordance with Sec.
110.20-1.
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    \5\ See https://www.dco.uscg.mil/Our-Organization/Assistant-Commandant-for-Prevention-Policy-CG-5P/Inspections-Compliance-CG-5PC-/Commercial-Vessel-Compliance/Flag-State-Control-Division/ClassSocAuth/.
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    Throughout Sec.  110.10-1, we also add additional standards to
provide alternative compliance options, remove outdated standards, and
clarify existing requirements. Where applicable, we update the naming
format, mailing addresses, phone numbers, and URL addresses for the
standards already incorporated by reference. These updates will ensure
that the standards are reasonably accessible to the public.
    Following this paragraph, we list the standards we are updating,
adding, or deleting in Sec.  110.10-1. Within each standard listed, we
describe the topics covered by the standard, the changes to the
standard, any differences between currently incorporated IBR standards,
and a list of the subparts or sections that reference the IBR standard.
If this rule does not make any changes to a standard that is currently
incorporated by reference, the standard will not be discussed in the
revisions to Sec.  110.10-1. However, it will be included, without
change, in the regulatory text of Sec.  110.10-1 that appears at the
end of this document.
     ABS Rules for Building and Classing Marine Vessels (ABS
Marine Vessel Rules), 2020. The rules contain a comprehensive set of
construction and maintenance requirements for ships and offshore
facilities. The rules are, in general, developed by the International
Association of Classification Societies (IACS) and by ABS staff, and
reviewed and approved by committees made up of naval architects, marine
engineers, shipbuilders, engine builders, steel makers and by other
technical, operating, and scientific personnel associated with the
worldwide maritime industry. Because of classification society rules'
comprehensive nature and ABS's long history of ensuring vessel safety
and seaworthiness, they are a valuable supplement to the numerous
voluntary consensus standards incorporated by reference. In subchapter
J the rules provide an option for the design of engineering systems and
components including generators, semiconductor rectifiers, and electric
propulsion systems. Specifically, we currently reference the 2003
edition in Sec. Sec.  110.15-1(b), 111.01-9(b), 111.12-3, 111.12-5,
111.12-7(a) and (b), 111.33-11, 111.35-1, 111.70-1(a), 111.105-31(n),
111.105-39 introductory text and (a), 111.105-40(a) and (c), and
113.05-7(a). In 2020, ABS transitioned from the ABS Steel Vessel Rules
to the ABS Marine Vessel Rules. This allowed ABS to consolidate several
rules into one foundational rule. We incorporate by reference the 2020
ABS Marine Vessel Rules in the aforementioned sections and additionally
in the new Sec.  112.05-7(c) related to use of emergency generators in
port. The ABS Marine Vessel Rules undergo an annual review and approval
process by ABS technical committees. The Coast Guard participates on
these committees, which are comprised of international experts with
relevant experience. We are incorporating by reference the following
parts of the ABS Marine Vessel Rules: Parts 1, 2, 3, 4, 5A, 5B, 5C, 5D,
6, and 7. Several of the sections of the ABS Marine Vessel Rules that
we incorporate

by reference have been individually updated. For example:
    [cir] ABS Marine Vessel Rules 4-8-3/Table 2: This table specifies
minimum degrees of protection for electrical equipment. This updated
table contains several technical updates since the 2003 edition,
including additional notes concerning areas protected by fixed water-
spray or water mist fire extinguishing systems, and equipment subject
to water splash.
    [cir] ABS Marine Vessel Rules 4-8-3: We reference this section for
generator construction requirements. The updated edition contains
technical updates to account for changes in technology since the 2003
edition.
    [cir] ABS Marine Vessel Rules 4-8-5/5.17.9: This section regarding
semiconductor rectifiers now requires a high temperature alarm.
    [cir] ABS Marine Vessel Rules 4-8-5/5.5: This edition contains
updates to propulsion generator requirements.
    [cir] ABS Marine Vessel Rules 4-8-2/9.17: This edition updates the
requirements for protection of motor circuits to address athwartship
thruster motor load alarms and more clearly defines the systems
requiring undervoltage release.
    [cir] ABS Marine Vessel Rules 4-8-3/5: This updated section
regarding switchboards and motor controllers contains additional cable
connection requirements, optional alternative creepage and clearance
distances, and additional requirements on battery and uninterruptible
power systems based on advancements in technology.
    [cir] ABS Marine Vessel Rules 5-10-4/3: This section regarding
roll-on/roll-off cargo spaces is now titled 5C-10-4/3. The new edition
made updates to ventilation requirements and to the tables of dangerous
goods.
    [cir] ABS Marine Vessel Rules 4-9-7/Table 9: This table regarding
equipment testing is now titled 4-9-8/Table 1. The updates to this
table reflect changes in technology and industry testing practices.
     ABS Rules for Building and Classing Mobile Offshore Units
(ABS MOU Rules), Part 4 Machinery and Systems, 2020. The rules contain
a comprehensive set of construction and maintenance requirements for
mobile offshore drilling units. In subchapter J the rules provide an
option for the design of engineering systems and components including
generator, semiconductor rectifier, and electric propulsion systems.
Specifically, we currently reference the 2001 edition in Sec. Sec.
111.12-1(a), 111.12-3, 111.12-5, 111.12-7(c), 111.33-11, 111.35-1, and
111.70-1(a). In 2020, ABS transitioned from the ABS Mobile Offshore
Drilling Units Rules to the ABS MOU Rules. This allowed ABS to
consolidate several rules into one foundational rule. By means of this
rule, we incorporate by reference the 2020 ABS MOU Rules. Like the ABS
Marine Vessel Rules, the ABS MOU Rules will undergo a regular review
and approval process by the ABS technical committees comprised of
international experts with relevant experience. ABS updated and changed
the title of several of the ABS MOU rules incorporated by reference in
these sections. For example:
    [cir] ABS MOU Rules 4-3-4 (renamed ABS MOU Rules 6-1-7): We
reference this section regarding generator construction requirements.
ABS made several technical updates since the 2001 edition to account
for changes in technology.
    [cir] ABS MOU Rules 4-3-4/3.5.3 (renamed 6-1-7/12): We reference
this section for semiconductor converters requirements. ABS made
several updates to the standard due to changes in technology.
    [cir] ABS MOU Rules 4-3-4/7.1 (renamed 6-1-7/9.9): We reference
this section regarding bus bars and wiring requirements. ABS made
several updates to the section since the 2001 edition.
     ANSI/IEEE C37.12[dash]1991--American National Standard for
Alternating Current (AC) High-Voltage Circuit Breakers Rated on a
Symmetrical Current Basis-Specifications Guide. We remove this standard
from Sec.  111.54-1 because IEEE changed the title and republished it
with updates in 2008 as IEEE C37.12-2008--IEEE Guide for Specifications
of High-Voltage Circuit Breakers (over 1000 V), 2008. This represented
a complete technical revision of the standard. IEEE subsequently
revised it again in 2018. We incorporate by reference IEEE C37.12-2018
in Sec.  111.54-1 and further discuss this standard with the other IEEE
standards incorporated by reference.
     ANSI/IEEE C37.27-1987 (IEEE 331)--Application Guide for
Low-Voltage AC Nonintegrally Fused Power Circuitbreakers (Using
Separately Mounted Current-Limiting Fuses). We remove the reference to
this standard in Sec.  111.54-1 because this guide was replaced by IEEE
C37.27--2015--IEEE Guide for Low-Voltage AC (635 V and below) Power
Circuit Breakers Applied with Separately-Mounted Current-Limiting
Fuses, 2015. We discuss this standard, IEEE C37.27--2015, with the
other IEEE standards incorporated by reference.
     ANSI/ISA-RP12.06.01-2003--Recommended Practice for Wiring
Methods for Hazardous (Classified) Locations Instrumentation Part 1:
Intrinsic Safety. This recommended practice provides guidance on
installation of intrinsically safe systems for use in hazardous
(classified) locations. It clarifies and explains the requirements of
Articles 504 and 505 of NFPA 70 (National Electrical Code). This
recommended practice supersedes ISA RP 12.6-1995. By means of this
rule, we delete ISA RP 12.6 from reference in Sec.  111.105-11 and
replace it with ANSI/ISA-RP12.06.01-2003.
     ANSI/ISA 12.12.01-2015--Nonincendive Electrical Equipment
for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2
Hazardous (Classified) Locations. The purpose of this standard is to
provide minimum requirements for the design, construction, and marking
of electrical equipment or parts of such equipment for use in Class I
and Class II, Division 2 and Class III, Divisions 1 and 2 hazardous
(classified) locations. This newer edition of the standard replaces
ANSI/ISA 12.12.01-2012, which the Coast Guard recently added to Sec.
111.108-3(b) as part of a separate rulemaking titled ``Electrical
Equipment in Hazardous Locations'' (80 FR 16980, Mar. 31, 2015).
Additionally, we include ANSI/ISA 12.12.01-2015 in Sec. Sec.  111.105-
3(b) and 111.106-3(b) as another certification option for electrical
equipment in hazardous location. The 2015 edition contains minor
technical changes from the 2012 edition.
     ANSI/ISA-60079-18--Explosive atmospheres--Part 18:
Equipment protection by encapsulation ``m'', Third Edition, 2012. This
standard gives the specific requirements for the construction, testing,
and marking of electrical equipment and parts of electrical equipment,
and for the designation of explosion-protected electrical apparatus
complying with IEC standards (Ex) components (which is part of an
electrical equipment module found in the European hazardous area
scheme) with the type of protection encapsulation ``m'' intended for
use in explosive gas atmospheres or explosive dust atmospheres. We
currently reference the 2009 edition of this standard in Sec.  111.106-
3(d), and the 2012 edition in Sec.  111.108-3(e). This rule removes the
ANSI/ISA-60079-18 references in Sec. Sec.  111.106-3(d) and 111.108-
3(e) because the standard has been withdrawn and replaced by UL 60079-
18, a substantively similar standard. We replace the ANSI/ISA standard
with UL 60079-18 in Sec.  111.106-3(d) and 111.108-3(e).

     API Recommended Practice (RP) 14F--Recommended Practice
for Design, Installation, and Maintenance of Electrical Systems for
Fixed and Floating Offshore Petroleum Facilities for Unclassified and
Class I, Division 1 and Division 2 Locations, Sixth Edition, October
2018. This document recommends minimum requirements and guidelines for
the design, installation, and maintenance of electrical systems on
fixed and floating petroleum facilities located offshore. By means of
this rule, we reference clause 6.8 of the document in Sec.  111.105-17.
This clause provides guidance on use of conduit, cable seals, and
sealing methods. The incorporation of this standard adds another wiring
option in hazardous locations.
     API RP 14FZ--Recommended Practice for Design,
Installation, and Maintenance of Electrical Systems for Fixed and
Floating Offshore Petroleum Facilities for Unclassified and Class I,
Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. This
document recommends minimum requirements and guidelines for the design,
installation, and maintenance of electrical systems on fixed and
floating petroleum facilities located offshore. By means of this rule,
we reference clause 6.8 of the document in Sec.  111.105-17. This
clause provides guidance on use of conduit, cable seals, and sealing
methods. The incorporation of this standard adds another wiring option
in hazardous locations.
     API RP 500--Recommended Practice for Classification of
Locations for Electrical Installations at Petroleum Facilities
Classified as Class I, Division 1 and Division 2, Third Edition,
December 2012 with errata January 2014. This recommended practice
provides guidelines for classifying locations at petroleum facilities
as Class I, Division 1 and Class I, Division 2 locations for the
selection and installation of electrical equipment. We currently
reference the second edition (1997) of this standard in Sec. Sec.
111.106-7(a) and 111.106-13(b). By means of this rule, we reference
instead the more recent, third edition (2012) in those sections. The
2012 edition contains editorial changes, but the technical content has
not changed.
     API RP 505--Recommended Practice for Classification of
Locations for Electrical Installations at Petroleum Facilities
Classified as Class I, Zone 0, Zone 1, and Zone 2, Second Edition,
August 2018. The purpose of this recommended practice is to provide
guidelines for classifying locations Class I, Zone 0, Zone 1, and Zone
2 at petroleum facilities for the selection and installation of
electrical equipment. We currently reference the first edition, which
was published in 1997 and reaffirmed in 2013, in Sec.  111.106-7(a) and
111.106-13(b). By means of this rule, we reference instead the more
recent, second edition (2018) in those sections. This does not
substantively change the requirements of those sections.
     ASME A17.1-2016/CSA B44-16--Safety Code for Elevators and
Escalators: Includes Requirements for Elevators, Escalators,
Dumbwaiters, Moving Walks, Material Lifts, and Dumbwaiters with
Automatic Transfer Devices, reissued January 16, 2017 with errata. This
code covers the design, construction, operation, inspection, testing,
maintenance, alteration, and repair of elevators, hoists, escalators
and their associated parts, rooms, and spaces. We currently reference
the sixteenth edition (2000) in Sec.  111.91-1. By means of this rule,
we reference instead the more recent, twenty-first edition (2016) in
that section. ASME updated this standard based on changes in
technology. The updated standard addresses new types of elevators being
used in the industry, specifically wind turbine elevators and outside
emergency elevators. In addition, the standard contains new
requirements to address a new feature called ``Elevator Evacuation
Operation'' that allows for the use of elevators for occupant
evacuation. Moreover, there are several major changes to the standard
that include seismic requirements, updated maintenance control program
requirements, and revisions regarding qualifications for elevator
inspectors. ASME A17 has been an industry accepted standard since 1921.
Although many of the changes to the presently incorporated edition of
the standard do not apply to shipboard elevators, it is important that
shipboard elevators meet the updated provisions that do apply.
     ASTM B117--19 Standard Practice for Operating Salt Spray
(Fog) Apparatus, 2019. This practice covers the apparatus, procedure,
and conditions required to create and maintain the salt spray (fog)
test environment. Where the Coast Guard's regulations require material
to be corrosion-resistant it must meet the testing requirements of this
ASTM standard practice. We currently reference the 1997 edition in
Sec.  110.15-1(b). By means of this rule, we reference instead the 2019
edition. The 1997 edition has been superseded by several subsequent
editions. ASTM made the following changes over the recent editions of
this standard that are ultimately incorporated into the 2019 version we
adopt in this rulemaking. The testing specifications in the 2011
edition are similar to those in the 1997 edition, but the 2011 edition
is more detailed. For example, the impurity restrictions are more
detailed in section 8, the air supply requirements are more specific in
section 9, and the conditions in the salt chamber are more precisely
described in section 10. The 2016 edition added a warning about the
impact of water conductivity in section 4 while the 2019 edition added
several minor but non-substantive explanatory sections. Overall, the
2019 edition of this testing standard practice for operating salt spray
apparatus is very similar to the 1997 edition currently incorporated,
with minor improvements in the specifications to ensure testing
consistency and precision.
     ASTM F2876-10--Standard Practice for Thermal Rating and
Installation of Internal Combustion Engine Packages for use in
Hazardous Locations in Marine Applications, Reapproved 2015. This
practice covers the method of testing, rating, and installing internal
combustion engine packages for use in hazardous areas in marine
applications. We currently reference the 2010 edition of this standard
in Sec. Sec.  111.106-3(h) and 111.108-3(g). By means of this rule, we
also reference the 2010 edition in new Sec.  111.105-28 regarding
internal combustion engines. This ensures a consistent standard for
these installations on all vessel and facility types.
     CSA C22.2 No. 30-M1986--Explosion-proof enclosures for use
in class I hazardous locations, Reaffirmed 2016. This standard covers
the details of construction and tests for explosion-proof enclosures
for electrical equipment to be used in Class I, Division 1, Groups A,
B, C, and D hazardous locations and in gaseous mines. We currently
reference the 1986 edition of this standard in Sec. Sec.  111.106-3(b)
and 111.108-3(b) and by means of this rule incorporate instead the
reaffirmed version therein. The two versions are not substantively
different. We also reference this reaffirmed standard in Sec.  111.105-
3(b), regarding approved equipment, as an additional compliance option.
This affords the broadest and most current selection of IBR explosion
protection standards for all vessel and facility types.
     CSA C22.2 No. 213-16--Nonincendive Electrical Equipment
for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2
Hazardous (Classified) Locations, May 2016. This standard provides the
details of construction and testing of electrical

equipment for use in Class I and II, Division 2 and Class III, Division
1 and 2 hazardous locations. We currently reference the 1987 edition in
Sec. Sec.  111.106-3(b) and 111.108-3(b). By means of this rule, we
reference instead the 2016 edition in these sections and also in Sec.
111.105-3(b) concerning approved equipment. This standard received a
major revision since the 1987 edition based on advances in technology
and changes to related standards. It is an accepted national standard
and one of several available standards for nonincendive electrical
equipment. Our incorporation of this updated edition ensures use of
latest industry practices and including it in Sec.  111.105-3 ensures
that standards are consistent for electrical installations on all
vessel and facility types.
     CSA-C22.2 No. 0-10--General requirements--Canadian
Electrical Code, Part II, including Update No. 2, dated November 2014,
Reaffirmed 2015. This standard covers definitions, construction
requirements, marking, and tests of a general nature that applies to
all or several of the individual standards of the Canadian Electrical
Code. We currently reference the ninth edition of this standard in
Sec. Sec.  111.106-3(b) and 111.108-3(b). By means of this rule, we
reference instead the tenth edition, reaffirmed in 2015, in these
sections and in Sec.  111.105-3(b) concerning approved equipment. The
tenth edition includes new requirements for equipment containing lasers
or lithium batteries, criteria for the use of adhesives in the
construction of electrical equipment, surface temperature limits,
attachment plug loading, and the maximum temperature of equipment in
contact with gypsum. Additionally, it incorporates a comprehensive list
of definitions for use in standards for electrical products and
outlines the relationship between this standard and electrical product
standards. We incorporate this more recent edition in subpart 111.105
to ensure that standards are consistent for electrical installations on
all vessel and facility types.
     CAN/CSA-C22.2 No. 157-92--Intrinsically safe and
nonincendive equipment for use in hazardous locations, including Update
No. 2, dated June 2003, reaffirmed 2016. This standard specifies the
testing of nonincendive electrical equipment and the details of
construction and tests for intrinsically safe electrical equipment for
use in hazardous locations. We currently reference the 1992 edition of
this standard, which is not substantively different from the reaffirmed
edition, in Sec. Sec.  111.106-3(b) and 111.108-3(b). By means of this
rule, we reference instead the reaffirmed 1992 edition in those
sections. In addition, we are adding a reference to the reaffirmed
edition in Sec.  111.105-3(b) concerning approved equipment, which
provides an additional option for vessels and facilities.
     MIL-DTL-24640C with Supplement 1--Detail Specification
Cables, Lightweight, Low Smoke, Electric, for Shipboard Use, General
Specification for, Nov. 8, 2011. This military specification provides
the details of construction and testing of lightweight, low smoke,
electric cables for Navy shipboard applications and is also used aboard
commercial vessels. Incorporating this specification by reference
allows manufacturers access to both military and commercial markets
without the cost of unnecessary additional testing to a similar
voluntary consensus standard. MIL-DTL-24640C is already incorporated by
reference and approved for Sec.  111.106-5(a). However, MIL-DTL-24640C
supersedes MIL-C-24640A (1996), currently referenced in Sec. Sec.
111.60-1 and 111.60-3. We incorporate the updated edition, MIL-DTL-
24640C (2011), into Sec.  111.60-1 only, because this rule deletes
Sec.  111.60-3. The updated edition, published in 2011, incorporates
the latest developments in marine cable materials and performance
enhancements but will not substantively change requirements. Supplement
1 includes lists of associated specification sheets and cables.
     MIL-DTL-24643C (as updated by Supplement 1A)--Detail
Specification Cables, Electric, Low Smoke Halogen-Free, for Shipboard
Use, General Specification for, Oct. 1, 2009 (including Supplement 1A
dated Dec. 13, 2011). This military specification is already
incorporated by reference in Sec.  111.106-5(a) and provides the
details of construction and testing of low-smoke halogen-free electric
cable for Navy shipboard applications and is also used aboard
commercial vessels. Incorporating this specification by reference
allows manufacturers access to both military and commercial markets
without the cost of unnecessary additional testing to a similar
voluntary consensus standard. This specification supersedes the
currently referenced MIL-C-24643A (1996) incorporated by reference in
Sec. Sec.  111.60-1 and 111.60-3. We delete references to MIL-C-24643A
(1996) and incorporate the latest standard MIL-DTL-24643C (2011) into
Sec.  111.60-1 only, because this rule rescinds Sec.  111.60-3. This
updated edition, published in 2011, incorporates the latest
developments in marine cable materials and performance enhancements.
Supplement 1 includes lists of associated specification sheets and
cables.
     MIL-DTL-76E--Military Specification Wire and Cable,
Hookup, Electrical, Insulated, General Specification for, Nov. 3, 2016.
This specification provides the standards for construction and testing
of single-conductor, synthetic-resin insulated, electrical hookup wire
and cable for use in the internal wiring of electrical and electronic
equipment. Incorporating this specification by reference allows
manufacturers access to both military and commercial markets without
the cost of unnecessary additional testing to a similar voluntary
consensus standard. We currently reference MIL-W-76D in Sec.  111.60-
11. In 2016 the standard was revised and renamed MIL-DTL-76E. This
edition has formatting changes and minor updates based on current
technology. We incorporate this revised standard as one of several
available standards for wire.
     EN 14744--Inland navigation vessels and sea-going
vessels--Navigation light, English Version, August 2005. This standard,
developed by the European Committee for Standardization, provides the
details for construction and testing of vessel navigation lights. By
means of this rule, we include it as an acceptable alternate standard
for navigation lights in Sec.  111.75-17(d)(2).
     FM Approvals Class Number 3600--Approval Standard for
Electrical Equipment for Use in Hazardous (Classified) Locations--
General Requirements, 2018. This standard identifies the basis for
approval of electrical equipment in hazardous (classified) locations.
It is used in conjunction with the other FM Approvals standards
referenced in subchapter J. We currently reference the 1998 edition of
this standard in Sec. Sec.  111.106-3(b) and 111.108-3(b). By means of
this rule, we incorporate instead the more recent 2018 edition for
Sec. Sec.  111.105-3(b), 111.106-3(b), and 111.108-3(b). This edition
includes transitioning from ISA series of standards to UL standards, an
expanded list of normative references, and more specificity regarding
the required quality control system. The incorporation of this more
recent edition ensures use of the latest industry practices and
including it in Sec.  111.105-3(b) regarding approved equipment ensures
that standards are consistent for electrical installations on all
vessel and facility types.
     FM Approvals Class Number 3610--Approval Standard for

Intrinsically Safe Apparatus and Associated Apparatus for Use in Class
I, II, and III, Division 1, Hazardous (Classified) Locations, January
2018. This standard provides requirements for the construction and
testing of electrical apparatus, or parts of such apparatus, whose
circuits are incapable of causing ignition in Classes I, II, and III,
Division 1 hazardous (classified) locations. We currently reference the
2004 edition of this standard in Sec. Sec.  111.106-3(b) and 111.108-
3(b). By means of this rule, we incorporate instead the more recent
2018 edition in Sec. Sec.  111.105-3(b), 111.106-3(b), and 111.108-
3(b). The incorporation of this more recent edition ensures use of
latest industry practices and including it in Sec.  111.105-3(b)
regarding approved equipment ensures that standards are consistent for
electrical installations on all vessel and facility types.
     FM Approvals Class Number 3611--Approval Standard for
Nonincendive Electrical Equipment for Use in Class I and II, Division
2, and Class III, Divisions 1 and 2, Hazardous (Classified) Locations,
January 2018. This standard provides requirements for the construction
and testing of electrical apparatus, or parts of such apparatus, whose
circuits are incapable of causing ignition in Class I and II, Division
2, and Class III, Divisions 1 and 2 hazardous (classified) locations.
This standard is currently referenced in Sec. Sec.  111.106-3(b) and
111.108-3(b). By means of this rule, we add this as an alternative
standard in Sec.  111.105-3(b) concerning approved equipment. This
ensures that standards are consistent for electrical installations on
all vessel and facility types.
     FM Approvals Class Number 3615--Approval Standard for
Explosion-proof Electrical Equipment General Requirements, January
2018. This standard contains the basic requirements for the
construction and testing of explosion-proof electrical apparatus. This
standard is currently referenced in Sec. Sec.  111.106-3(b) and
111.108-3(b). By means of this rule, we add this as an alternative
standard in Sec.  111.105-3(b) regarding approved equipment. This
ensures that standards are consistent for electrical installations on
all vessel and facility types.
     FM Approvals Class Number 3620--Approval Standard for
Purged and Pressurized Electrical Equipment for Hazardous (Classified)
Locations, January 2018. This standard contains the basic requirements
for the construction and testing of purged and pressurized electrical
equipment. We currently reference the 2000 edition of this standard in
Sec. Sec.  111.106-3(b) and 111.108-3(b). By means of this rule, we
reference instead the 2018 edition in Sec. Sec.  111.105-3(b), 111.106-
3(b), and 111.108-3(b). The two editions of the standard are not
substantively different and adding it to Sec.  111.105-3(b) ensures
consistent standards for electrical installations on all vessel and
facility types.
     IEEE Std. C37.04-2018--IEEE Standard for Ratings and
Requirements for AC High-Voltage Circuit Breakers with Rated Maximum
Voltage above 1000 V, approved December 5, 2018. This document
establishes a rating structure, preferred ratings, construction, and
functional component requirements for high-voltage AC circuit breakers.
We currently reference the 1999 edition of this standard in Sec.
111.54-1. By means of this rule, we reference instead the 2016 edition
in Sec.  111.54-1. This more recent edition contains updates that
reflect current circuit breaker manufacturing technology.
     IEEE Std. C37.010-2016--IEEE Application Guide for AC
High-Voltage Circuit Breakers 1000 Vac Rated on a
Symmetrical Current Basis, approved September 22, 2016. This document
provides guidance for the application of high-voltage circuit breakers.
We currently reference the 1999 edition of this standard in Sec.
111.54-1. By means of this rule, we reference instead the 2016 edition
in Sec.  111.54-1. This more recent edition contains updates that
reflect current circuit breaker manufacturing technology.
     IEEE Std. C37.12-2018--IEEE Guide for Specifications of
High-Voltage Circuit Breakers (over 1000 V), approved December 5, 2018.
These specifications apply to all indoor and outdoor types of AC high-
voltage circuit breakers rate above 1000 volts (V). It replaces ANSI/
IEEE C37.12-1991. IEEE C37.12-2018 represents a nearly complete rewrite
of 1991 edition to reflect present circuit breaker manufacturing
technology. The 2018 edition of this standard is one of several
acceptable circuit breaker standards listed in Sec.  111.54-1.
     IEEE Std. C37.13-2015--IEEE Standard for Low-Voltage AC
Power Circuit Breakers Used in Enclosures, approved 5 Dec. 2015. This
standard establishes minimal functional requirements, establishes
preferred rating structure, and provides preferred ratings enclosed
low-voltage AC power circuit breakers. We currently reference the 2000
edition of this standard in Sec.  111.54-1. By means of this rule, we
reference instead the 2015 edition in Sec.  111.54-1. This more recent
edition has many technical updates to address advancements in
technology, including an increase in nominal voltages, new testing
techniques, and removal of information on DC circuit-breakers (now
located in IEEE C37.14). This standard is one of several acceptable
circuit-breaker standards in Sec.  111.54-1.
     IEEE Std. C37.14-2015--IEEE Standard for DC (3200 V and
below) Power Circuit Breakers Used in Enclosures, approved 26 Mar.
2015. This standard covers the preferred ratings and testing
requirements of enclosed DC power circuit breakers. We currently
reference the 2003 edition of this standard Sec.  111.54-1. By means of
this rule, we reference instead the more recent 2015 edition in Sec.
111.54-1, which contains many technical changes to reflect present
circuit breaker manufacturing technology and advancements in
technology.
     IEEE Std. C37.27-2015--IEEE Guide for Low-Voltage AC (635
V and below) Power Circuit Breakers Applied with Separately-Mounted
Current-Limiting Fuses, approved December 5, 2015. This guide sets
forth recommendations for the selection of current-limiting fuses for
use in combination with low-voltage AC power circuit breakers. This
guide replaces ANSI/IEEE C37.27-1987, which we currently reference in
Sec.  111.54-1. IEEE C37.27-2015 contains many technical updates to
address advancements in circuit breaker manufacturing technology, which
provide the public with more accurate and applicable standards for
modern circuit breakers than the previous 1987 edition. We incorporate
this guide as one of several acceptable circuit breaker standards
listed in Sec.  111.54-1.
     IEEE Std. 45-1998--IEEE Recommended Practice for Electric
Installations on Shipboard--1998. IEEE 45-2002 superseded the 1998
edition, but in some instances the Coast Guard previously found the
1998 edition preferable and continued to reference it. Because the 1998
edition is no longer supported by IEEE and other acceptable standards
exist, we delete all references to this standard, which is currently
referenced in Sec. Sec.  111.30-19, 111.105-3, 111.105-31, and 111.105-
41.
     IEEE Std. 45-2002--IEEE Recommended Practice for
Electrical Installations On Shipboard--2002. We currently reference
this edition of IEEE 45 in the following sections in subchapter J:
Sec. Sec.  111.05-7, 111.15-2, 111.30-1, 111.30-5, 111.33-3, 111.33-5,
111.40-1, 111.60-1, 111.60-3, 111.60-5, 111.60-11, 111.60-13, 111.60-
19, 111.60-21, 111.60-23, 111.75-5, and 113.65-5. IEEE has developed
the IEEE 45 Series, which comprises nine recommended practices
addressing electrical installations on ships and

marine platforms. We replace references to IEEE 45-2002 with newer IEEE
45 Series recommended practices, individually discussed below, in those
sections (except in Sec.  111.60-11 because the IEEE 45 does not
address wire-related issues that were previously covered by IEEE 45).
     IEEE Std. 45.1-2017--IEEE Recommended Practice for
Electrical Installations On Shipboard--Design, approved 23 Mar. 2017.
This recommended practice provides guidance for electrical power
generation, distribution, and electric propulsion system design. These
recommendations reflect the present-day technologies, engineering
methods, and engineering practices. By means of this rule, we reference
this standard in Sec. Sec.  111.15-2, 111.40-1, 111.75-5, and 113.65-5.
The technical content is similar to IEEE 45-2002, which we delete from
these sections. We also add a reference to this standard in Sec.
111.105-41 concerning battery rooms.
     IEEE Std. 45.2-2011--IEEE Recommended Practice for
Electrical Installations On Shipboard--Controls and Automation,
approved 10 Sep. 2011. This recommended practice provides guidance for
shipboard controls, control applications, control apparatus, and
automation. These recommendations reflect present-day technologies,
engineering methods, and engineering practices. By means of this rule,
we reference this document in Sec. Sec.  111.33-3 and 111.33-5. The
technical content is similar to IEEE 45-2002, which we delete from
these sections.
     IEEE Std. 45.6-2016--IEEE Recommended Practice for
Electrical Installations on Shipboard--Electrical Testing, approved 7
Dec. 2016. This recommended practice provides guidance for electrical
testing for power generation, distribution, and electric propulsion
systems. These recommendations reflect present-day technologies,
engineering methods, and engineering practices. By means of this rule,
we reference this document in Sec.  111.60-21. Its technical content is
similar to IEEE 45-2002, which we delete from this section.
     IEEE Std. 45.7-2012--IEEE Recommended Practice for
Electrical Installations On Shipboard--AC Switchboards, approved 29
Mar. 2012. This recommended practice supplements the design,
installation, and testing recommendations in IEEE 45-2002. This
recommended practice provides new technologies and design practices for
generator control panels and switchboards to aid marine electrical
engineers in the design, application, and installation of this
equipment on ships and other marine installations. By means of this
rule, we reference this document in Sec. Sec.  111.30-1, 111.30-5, and
111.30-19. The technical content of IEEE 45.7-2012 is similar to IEEE
45-2002, but more detailed. It also references other industry
standards, many of which we have incorporated by reference elsewhere in
subchapter J.
     IEEE Std. 45.8-2016--IEEE Recommended Practice for
Electrical Installations On Shipboard--Cable Systems, approved 29 Jan.
2016. This document provides recommendations for selection,
application, and installation of electrical power, signal, control,
data, and specialty marine cable systems on shipboard systems. These
recommendations include present-day technologies, engineering methods,
and engineering practices. By means of this rule, we replace references
to IEEE 45-2002 with IEEE 45.8-2016 in Sec. Sec.  111.05-7, 111.60-5,
111.60-13, and 111.60-19. The technical content of IEEE 45.8-2016 is
similar to IEEE 45-2002, but more detailed.
     IEEE Std. 1202-2006--IEEE Standard for Flame-Propagation
Testing of Wire and Cable with Corrigendum 1, reaffirmed December 5,
2012, Corrigendum 1 approved October 19, 2012. This standard provides a
protocol for exposing cable samples to a theoretical 20 kilowatt (kW)
[70,000 British thermal units per hour] flaming ignition source for a
20-minute test duration. The test determines the flame propagation
tendency of single conductor and multi-conductor cables intended for
use in cable trays. We currently reference the 1991 edition in
Sec. Sec.  111.60-6 and 111.107-1(c). By means of this rule, we
reference instead the more recent 2006 edition in Sec. Sec.  111.60-6
and 111.107-1(c). In the 2006 edition, the normative references have
been updated, the temperature at which cables are conditioned has been
raised from 18 [deg]C to 25 [deg]C, and minor refinements to the test
procedure have been made.
     IEEE Std. 1580-2010--IEEE Recommended Practice for Marine
Cable for Use on Shipboard and Fixed or Floating Facilities, approved
30 Sep. 2010. This recommended practice contains the requirements for
single or multiconductor cables, with or without metal armor or jacket,
and rated 300 V to 35 kilovolts (kV), intended to be installed aboard
marine vessels, and fixed and floating offshore facilities. The 2001
edition is currently referenced in Sec. Sec.  111.60-1, 111.60-2,
111.60-3, and 111.106-5(a). By means of this rule, we reference instead
the more recent 2010 edition only in Sec. Sec.  111.60-1, 111.60-2, and
111.106-5(a) because we delete Sec.  111.60-3 in this rule. The 2010
edition has been updated to incorporate the latest developments in
marine cable materials and performance enhancements.
     IEC 60068-2-52:2017--Environmental testing Part 2-52:
Tests--Test Kb: Salt mist, cyclic (sodium chloride solution), Edition
3.0, 2017-11. This standard specifies the application of the cyclic
salt mist test to components or equipment designed to withstand a salt-
laden atmosphere as salt can degrade the performance of parts
manufactured using metallic or non-metallic materials. The second
edition is referenced in Sec.  110.15-1. By means of this rule, we
incorporate instead the third edition. In this more recent edition, the
standard has been updated to ensure consistency with SO 9227--Corrosion
tests in artificial atmospheres--Salt spray tests.
     IEC 60079-0--Electrical apparatus for Explosive Gas
Atmospheres--Part 0: General Requirements, Edition 3.1, 2000. This part
of the IEC 60079 series of standards specifies the general requirements
for construction, testing, and marking of electrical equipment and Ex
components intended for use in explosive atmospheres. This standard was
referenced in Sec. Sec.  111.105-1, 111.105-3, 111.105-5, and 111.105-
17. By means of this rule, we will reformat subpart 111.105 to be
consistent with subparts 111.106 and 111.108 and will no longer
specifically reference IEC 60079-0.
     IEC 60079-1:2014--Explosive atmospheres--Part 1: Equipment
protection by flameproof enclosures ``d'', Edition 7.0, 2014-06. This
part of the IEC 60079 series of standards contains specific
requirements for the construction and testing of electrical equipment
with the type of protection flameproof enclosure ``d'', which are
intended for use in explosive gas atmospheres. We currently reference
the fourth edition (2001) of this standard in Sec. Sec.  111.105-1,
111.105-3, 111.105-5, 111.105-9, and 111.105-17 while the sixth edition
(2007) is referenced in Sec. Sec.  111.106-3(b) and 111.108-3(b). By
means of this rule, we remove all references to the fourth and sixth
editions of this standard, and replace them with the more recent
edition 7.0 (2014) in Sec. Sec.  111.105-3(b), 111.106-3(b), and
111.108-3(b). The updated standard reflects advances in technology,
including:
    [cir] Addition of material limitations of enclosures of equipment
and enclosures of Ex components for external mounting;

    [cir] Addition of power factor requirement for evaluating the
ability of a plug and socket to remain flameproof during the arc-
quenching period while opening a test circuit; and
    [cir] Addition of marking requirements for Ex component enclosures,
in addition to the requirements for marking of Ex components given in
IEC 60079-0.
     IEC 60079-2:2014--Explosive atmospheres--Part 2: Equipment
protection by pressurized enclosures ``p'', with Corrigendum 1 (2015),
Edition 6.0, 2014-07. This part of the IEC 60079 series of standards
contains specific requirements for the construction and testing of
electrical equipment with pressurized enclosures, of type of protection
``p'', intended for use in explosive gas atmospheres or explosive dust
atmospheres. It also includes the requirements for pressurized
enclosures containing a limited release of a flammable substance. We
currently reference the fourth edition (2001) of this standard in
Sec. Sec.  111.105-1, 111.105-3, 111.105-5, 111.105-7, and 111.105-17,
while the fifth edition (2007) is referenced in Sec. Sec.  111.106-3(b)
and 111.108-3(b). By means of this rule, we delete all references to
the fourth and fifth edition. The more recent edition 6.0 (2014) is
incorporated in Sec. Sec.  111.105-3(b), 111.105-17, 111.106-3(b), and
111.108-3(b). The updated standard now covers combustible dust, cells
and batteries, and backup protective gas. The incorporation of the more
recent edition ensures consistent, up-to-date standards for electrical
installations on all vessel and facility types.
     IEC 60079-5:2015--Explosive atmospheres--Part 5: Equipment
protection by powder filling ``q'', Edition 4.0, 2015-02. This part of
the IEC 60079 series of standards contains specific requirements for
the construction, testing, and marking of electrical equipment, parts
of electrical equipment, and Ex components in the type of protection
powder filling ``q'', intended for use in explosive gas atmospheres. We
currently reference the second edition (1997) of this standard in
Sec. Sec.  111.105-1, 111.105-3, 111.105-5, 111.105-7, 111.105-15, and
111.105-17, while the third edition (2007) is referenced in Sec. Sec.
111.106-3(b) and 111.108-3(b). By means of this rule, we delete all
references to the second and third edition. The more recent edition 4.0
(2015), containing minor technical revisions and clarifications, is
incorporated into Sec. Sec.  111.105-3(b), 111.106-3(b), and 111.108-
3(b). This will ensure consistent, up-to-date standards for electrical
installations on all vessel and facility types but will not result in a
substantive change to the current requirements.
     IEC 60079-6:2015--Explosive atmospheres--Part 6: Equipment
protection by liquid immersion ``o'', Edition 4.0, 2015-02. This part
of the IEC 60079 series of standards specifies the requirements for the
design, construction, testing and marking of Ex equipment and Ex
components with type of protection liquid immersion ``o'' intended for
use in explosive gas atmospheres. We currently reference the second
edition (1995) of this standard in Sec. Sec.  111.105-1, 111.105-3,
111.105-5, 111.105-7, 111.105-15, and 111.105-17, while the third
edition (2007) is referenced in Sec. Sec.  111.106-3(b) and 111.108-
3(b). By means of this rule, we delete all references to the second and
third edition. The more recent edition, 4.0 (2015), will be added to
Sec. Sec.  111.105-3(b), 111.106-3(b), and 111.108-3(b). The
incorporation of the latest edition ensures consistent, up-to-date
standards for electrical installations on all vessel and facility