Dịch vụ & Phân phốiCâu 94 / 521
Six current-carrying conductors are installed in a single raceway. The ampacity adjustment factor that must be applied to each conductor is:
a.80%
b.70%
c.50%
d.100%
Giải thích
Per Table 310.15(C)(1), for 4 through 6 current-carrying conductors the adjustment factor is 80%. Seven through nine conductors use 70%, and 100% would apply only to three or fewer conductors, so those factors do not fit six conductors.
Trích dẫn luật: 2023 NEC §310.15Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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