You can understand grounding by overcoming common reasons for
confusion.  When people are tripped up by the requirements for
grounding, it's often because they don't realize Art. 250 covers
both grounding and bonding. An unfamiliarity with the
fundamental differences between the terms bonded, grounded, and
effectively grounded makes the situation even worse. Not knowing
these definitions makes proper application impossible.  How do
grounding and bonding differ? When you bond something, you're
permanently joining metallic parts to form an electrically
conductive path that can safely conduct any fault current likely
to be imposed. Proper bonding creates an effective, low-
impedance, ground-fault current path for the purpose of removing
dangerous voltage from a ground fault by quickly opening the
related overcurrent protection device (OCPD).  When you ground
metal parts of electrical equipment you're intentionally
connecting the equipment to earth. Failure to properly do so
could result in high voltage on metal p