Thiết bị & Hệ thốngCâu 289 / 521
Per NEC 430.62, the maximum feeder overcurrent device for several motors equals the largest branch-circuit protective device rating plus the sum of the other motors' FLCs. If the largest motor's branch device is 90 A and the other motors' FLCs total 35 A, what is the maximum feeder device?
a.125 A
b.215 A
c.90 A
d.160 A
Giải thích
430.62(A): 90 A (largest branch device) + 35 A (sum of other FLCs) = 125 A maximum. 215 A wrongly adds all device ratings, 90 A ignores the other motors, and 160 A uses the wrong sum.
Trích dẫn luật: 2023 NEC §430.62Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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