Equipment & SystemsQuestion 271 of 521
Using NEC Table 430.250, what is the full-load current of a 50 HP, 460 V, three-phase motor?
a.52 A
b.77 A
c.65 A
d.96 A
Explanation
Table 430.250 lists 65 A for a 50 HP, 460 V three-phase motor. 52 A is 40 HP, 77 A is 60 HP, and 96 A is 75 HP at 460 V.
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Related questions on this topic
- Under NEC 430.102(B), where must the disconnecting means for a motor generally be located?
- Per NEC Table 430.248, what is the full-load current of a 3 HP, single-phase, 115 V motor?
- For the 3 HP, 115 V single-phase motor (FLC 34 A), what minimum branch-circuit conductor ampacity does NEC 430.22 require?
- For the 50 HP, 460 V motor (FLC 65 A), what minimum branch-circuit conductor ampacity is required by NEC 430.22?
- 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?
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