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A 150-Horsepower, Three-Phase Squirrel-Cage Induction Motor Is Connected to 440

Question 9

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A 150-horsepower, three-phase squirrel-cage induction motor is connected to 440 volts. The motor nameplate lists the following information:
Amps 175
SF 1.25
NEMA code B
The conductors are to be copper with type THHN insulation. The short-circuit protective device is to be an inverse- time circuit breaker. The termination temperature rating is not known.
Determine the conductor size and overload size.

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The conductor size is determined from th...

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