Dịch vụ & Phân phốiCâu 65 / 521
A feeder supplies a continuous load of 40 A and a noncontinuous load of 60 A. The minimum feeder conductor ampacity before applying any adjustment factors is:
a.100 A
b.105 A
c.110 A
d.125 A
Giải thích
Feeder conductors must have an ampacity of at least the noncontinuous load plus 125% of the continuous load: 60 + (40 x 1.25) = 110 A. The 100 A option omits the continuous multiplier, and 125 A over-applies it to the entire load.
Trích dẫn luật: 2023 NEC §215.2Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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