Branch Circuits — Texas Master Practice Questions

Exam tip

Always check the specific requirements for overcurrent protection for countertop appliances.

Why B is correct

According to 210.11(A), the overcurrent protection for a countertop microwave oven must be not less than 15 amperes. The 10-ampere and 25-ampere options are insufficient, and the 20-ampere option is not required.

Exam tip

Always refer to the specific requirements for overcurrent protection for kitchen ranges.

Why C is correct

According to 210.11(A), the overcurrent protection for a kitchen range must be not less than 30 amperes. The 20-ampere and 15-ampere options are insufficient, and the 40-ampere option is not required.

Exam tip

Always check the specific requirements for overcurrent protection for clothes dryers.

Why D is correct

According to 210.11(A), the overcurrent protection for a clothes dryer must be not less than 30 amperes. The 20-ampere and 30-ampere options are insufficient, and the 40-ampere option is not required.

Exam tip

Be familiar with the requirements for overcurrent protection for motors.

Why C is correct

According to 430.22(C), the overcurrent protection for a motor must be not less than the motor's full-load current rating. The 300-ampere and 400-ampere options are insufficient, and the 600-ampere option is not required.

Exam tip

Ensure you understand the requirements for overcurrent protection based on the type of load.

Why B is correct

According to 210.11(B), the overcurrent protection for a vending machine must be not less than the rating of the branch circuit. Therefore, the minimum size of the overcurrent protection required is 50 amperes.