Motors & EquipmentQuestion 101 of 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
Explanation
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.
Law Reference: 2023 NEC §445.13(A)Practice all 120 questions free — no signup required.
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