3-phase, 50-horsepower induction motor
1. What is the full-load current of a 600-volt, 3-phase, 50-horsepower induction motor
2. What is the minimum conductor ampacity, overload protection, and dual-element fuse
rating for a circuit supplying a 560-volt, 3-phase, code J, 40°C, 125-horsepower motor
with a nameplate full-load current of 115 amperes?
3. What is the minimum conductor size, overload protection, and inverse-time circuitbreaker rating for a circuit supplying a 230-volt, 3-phase, code A, 40°C, 75-horsepower synchronous motor operating at an 80% power factor with a nameplate full-load
current of 185 amperes?
4. What size conductor would be required to supply three motors connected to a 440-
volt, 3-phase branch circuit? Motor #1 is a 50-horsepower, code B induction motor;
motor #2 is a 40-horsepower, code H induction motor; and motor #3 is a 50-horsepower, code J induction motor
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