At EC&M, we know NEC issues are very important to our readers.
That's why we've dedicated a department to answering your latest
Code questions and concerns. When you find yourself stumped by
the Code, just e-mail your question to the author at
mike@mikeholt.com for future consideration in Code Quandaries.
Q. I'm installing 3-in. intermediate metal conduit (IMC) with an
extended run length of about 300 ft to 350 ft. My coworkers told
me I have to install a pull box about every 100 ft, but I can't
find a reference to this in the NEC. Is there a rule in the Code
that specifies the maximum distance between pull points?  A. No.
The Code does not specify when a pull box is required, but Sec.
314.28 does specify how to properly size a pull box. You can run
the raceway as long as you want, but the Code does not permit
more than the equivalent of four quarter bends (360∞ total)
between pull points [Secs. 362.26, 342.26, 344.26, 352.46,
358.26, 348.26, 350.26, and 356.26].  Q. I just set a service on
a new house where