Metal parts of a building ________ be permitted as an equipment grounding conductor (EGC) or as a secondary return conductor with respect to electric signs and outline lighting.
A) shall not
B) shall
C) may
D) may not
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Answer: A
As outlined in Sec. 600.7(A)(5) of the 2017 National Electrical Code (NEC), metal parts of a building shall not be permitted as an EGC or as a secondary return conductor with respect to electric signs and outline lighting.
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].
