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Utah Barber Practice Exam
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What is the maximum number of 12 AWG conductors permitted in a 4' x 1-1/2' x 1-1/2' square device box, assuming no internal clamps or support fittings?
6
7
8
9
Reveal Answer
Correct Answer:
9
Explanation:
According to NEC Table 314.16(A), a 4' x 1-1/2' x 1-1/2' square device box has a volume of 21.0 cubic inches. For 12 AWG conductors, each conductor requires 2.25 cubic inches. Therefore, 21.0 / 2.25 = 9.33, meaning a maximum of 9 conductors are permitted.
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