Motor Controller Functions

A motor controller shall open all conductors to the motor where not used as a disconnecting means.

a) True
b) False

See answer and applicable Code reference

The correct answer is: b) False

Article 430 covers motors, motor circuits and controllers. Part VI of this Article focuses on motor control circuits. As per Sec. 430.84, "The controller shall not be required to open all conductors to the motor." An Exception notes: "Where the controller serves also as a disconnecting means, it shall open all ungrounded conductors to the motor as provided in 430.111."

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