An industrial facility has a 440V, 3-phase motor with a full-load current of 100A. What is the minimum overcurrent protection required for this motor, according to 430.52(A)(1)?

Texas Master exam practice question · Calculations & Theory

An industrial facility has a 440V, 3-phase motor with a full-load current of 100A. What is the minimum overcurrent protection required for this motor, according to 430.52(A)(1)?

125A
B100A
C80A
D150A

Exam tip

Remember that the overcurrent protection for motors must be at least 125% of the full-load current.

Why A is correct

According to 430.52(A)(1), the overcurrent protection for a motor must not be less than 125% of the motor's full-load current. Therefore, 125% of 100A is 125A, which is the minimum required overcurrent protection.

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An industrial facility has a 440V, 3-phase motor with a full-load current of 100A. What is the minimum overcurrent protection required for this motor, according to 430.52(A)(1)?

An industrial facility has a 440V, 3-phase motor with a full-load current of 100A. What is the minimum overcurrent protection required for this motor, according to 430.52(A)(1)?

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