If cables are bundled together for more than 24 inches and the total number of current-carrying conductors exceeds __________, the ampacity of the conductors must be derated.
A) two
B) three
C) four
D) five

Question

Quizplus · Accepted Answer

According to the National Electrical Code (NEC) 310.15(B)(3)(a), if cables are bundled together for more than 24 inches and the total number of current-carrying conductors exceeds three, the ampacity of the conductors must be derated. Therefore, the correct answer is B.

If Cables Are Bundled Together for More Than 24 Inches