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Question: Where branch-circuit conductors pass through a panelboard and do not originate or terminate in that panelboard...

Posted By Keith Lofland , Sunday, January 01, 2012
Updated: Thursday, September 06, 2012

Question

Where branch-circuit conductors pass through a panelboard and do not originate or terminate in that panelboard, is there any requirement for identifying where the overcurrent devices are located for these pass-through conductors? TG

Answer

In this instance, the panelboard is serving the function of a pull box for these pass-through conductors. A panelboard is permitted for this purpose if proper wire bending space is provided as per 408.55. Feed-through conductors are permitted in a cabinet that contains overcurrent devices (such as a panelboard) per 312.8. One of the conditions required by 312.8 in permitting this application is that a warning label is required to be applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors. This is a new requirement for the 2011 NEC.
— Keith Lofland, CMP-9


About Keith Lofland: L. Keith Lofland is director of education, codes and standards for IAEI International. Previously, he was education, codes and standards coordinator and served a seminar specialist. Prior to his position with IAEI International, Keith spent nineteen years with the city of Garland, Texas, serving as their chief electrical inspector. He served as chair of the Texas Chapter in 1989. He served as secretary/treasurer for the Texas Chapter for ten years. Keith has taught seminars for IAEI since 2000.

Tags:  Focus on the Code  January-February 2012 

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