When motors are ___ hp or greater, the motor nameplate shall include the rated horsepower.

When motors are ___ hp or greater, the motor nameplate shall include the rated horsepower.

• A. 1/8
• B. 2
• C. 1/2
• D. 1/4

Answer: (A)

The key idea here is that motors must carry a nameplate with essential performance data so the installer can size protection and wiring correctly and know what the motor can deliver. The rule sets a minimum motor size for this requirement at 1/8 horsepower. Once a motor is at or above 1/8 hp, the nameplate must show the rated horsepower, along with other data, so you can accurately select overcurrent protection, conductors, and motor controllers and avoid mismatches that could cause overheating or nuisance trips. Smaller motors under 1/8 hp typically don’t carry the same labeling requirements, so the threshold is set at 1/8 hp. The other options would imply higher minimum sizes and would miss providing this critical data for many small but still important motors.

The key idea here is that motors must carry a nameplate with essential performance data so the installer can size protection and wiring correctly and know what the motor can deliver. The rule sets a minimum motor size for this requirement at 1/8 horsepower. Once a motor is at or above 1/8 hp, the nameplate must show the rated horsepower, along with other data, so you can accurately select overcurrent protection, conductors, and motor controllers and avoid mismatches that could cause overheating or nuisance trips. Smaller motors under 1/8 hp typically don’t carry the same labeling requirements, so the threshold is set at 1/8 hp. The other options would imply higher minimum sizes and would miss providing this critical data for many small but still important motors.