Fill in the blank. The total area of the conductors, splices, taps and equipment at any cross section of the wiring space within enclosures for switches or overcurrent devices that contain power monitoring equipment shall not exceed ____ of the cross-sectional area of that space.
A) 20%
B) 50%
C) 75%
D) None of the above
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Answer: C
As outlined in Sec. 312.8(B), the total area of all conductors, splices, taps and equipment at any cross section of the wiring space within enclosures for switches or overcurrent devices that contain power monitoring equipment shall not exceed 75% of the cross-sectional area of that space.
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].
