Question

A 25-HP, continuous-duty, three-phase squirrel-cage induction motor is connected to a 240-volt line. The conductors are run in conduit to the motor. The motor does not have a NEMA design code listed on the nameplate. The termination temperature rating of the devices is not known. Copper conductors with THWN insulation are to be used for the motor connection. What size conductors should be used?

Name: a 25 hp continuous duty three phase squirrel cage induction motor is connected to a 240 volt line the conductors are run in conduit to the motor the motor does not have a nema design code li 92505
Uploaded: 2023-07-15T12:57:29-08:00
Duration: 1 min 12 s
Channel: Madhur L
Description: a 25 hp continuous duty three phase squirrel cage induction motor is connected to a 240 volt line the conductors are run in conduit to the motor the motor does not have a nema design code li 92505

          A 25-HP, continuous-duty, three-phase squirrel-cage induction motor is connected to a 240-volt line. The conductors are run in conduit to the motor. The motor does not have a NEMA design code listed on the nameplate. The termination temperature rating of the devices is not known. Copper conductors with THWN insulation are to be used for the motor connection. What size conductors should be used?

Added by Anthony P.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

07/15/2023

Step 1

Determine the full load current (FLC) of the motor: FLC = (HP x 746) / (sqrt(3) x voltage) FLC = (25 x 746) / (sqrt(3) x 240) FLC = 70.7 amps Show more…

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A 25-HP, continuous-duty, three-phase squirrel-cage induction motor is connected to a 240-volt line. The conductors are run in conduit to the motor. The motor does not have a NEMA design code listed on the nameplate. The termination temperature rating of the devices is not known. Copper conductors with THWN insulation are to be used for the motor connection. What size conductors should be used?