Motors & EquipmentCâu 101 / 120
A generator nameplate current rating is 200 amperes. What minimum conductor ampacity is required from the generator terminals to the first overcurrent device?
a.230 amperes
b.200 amperes
c.250 amperes
d.160 amperes
Giải thích
Conductors from generator terminals to the first distribution device must have an ampacity of at least 115 percent of the nameplate current rating: 200 x 1.15 = 230 A, which corresponds to 4/0 copper at 75 degrees C. The 200-ampere answer omits the factor, 250 amperes uses 125 percent, and 160 amperes derates rather than uprates.
Trích dẫn luật: 2023 NEC §445.13(A)Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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