Thiết bị & Hệ thốngCâu 276 / 521
If the 125% overload device will not allow a 62 A (SF 1.15) motor to start, NEC 430.32(C) permits increasing the overload trip setting to a maximum of what value?
a.77.5 A (125%)
b.80.6 A (130%)
c.83.7 A (135%)
d.86.8 A (140%)
Giải thích
NEC 430.32(C) allows the overload trip to be increased to a maximum of 140% of nameplate FLA (for SF >=1.15 motors) when the sized device won't let the motor start: 62 x 1.40 = 86.8 A. 130% and 135% are not the code ceiling, and 125% is the initial value.
Trích dẫn luật: 2023 NEC §430.32Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For the 50 HP, 460 V motor (FLC 65 A), what is the maximum inverse-time circuit breaker per the 250% column of Table 430.52?
- For a continuous-duty three-phase motor rated more than 1 HP without integral overload protection, how many overload units are generally required?
- A continuous-duty motor has a nameplate FLA of 62 A and a service factor of 1.15. What is the maximum overload device rating at 125% under NEC 430.32(A)(1)?
- Per NEC Table 430.248, what is the full-load current of a 2 HP, single-phase, 230 V motor?
- Using NEC Table 430.250, what is the full-load current of a 100 HP, 460 V, three-phase motor?
- For a 100 HP, 460 V motor (FLC 124 A), what minimum branch-circuit conductor ampacity does NEC 430.22 require?
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