If a 480V, three-phase motor control center feeds a 50hp motor (65A), a 40hp motor (52A), and a 10hp motor (14A), the minimum feeder ampacity is _____.
a. 147.25A
b. 161.25A
c. 175.8A
d. 190.85A
a. 147.25A
MCC feeder ampacity = (largest motor x 1.25) + sum of remaining motors = (1.25 x
65A) + 52A + 14A = 147.25A
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