HOLT Electricians Practice Exam

What is the maximum ampere rating for motor loads that a snap switch can control?

1. 1 horsepower

2. 2 horsepower

3. 4 horsepower

4. 5 horsepower

The correct answer is: 2 horsepower

The maximum ampere rating for motor loads that a snap switch can control is based on the common practice and regulations outlined in the National Electrical Code (NEC). For standard snap switches, they are generally rated to handle motor loads up to a specific horsepower limit, which is directly linked to the voltage and overall electrical design. When a motor is rated at 2 horsepower, it typically corresponds to a current draw that snap switches can manage safely without risk of overheating or failure. This rating ensures the switch can operate effectively while providing safety measures against overloads. The other horsepower ratings exceed the capabilities commonly associated with snap switches, risking their operational integrity and safety if used for higher horsepower motors. Therefore, the 2-horsepower rating is recognized as the maximum load that ensures reliable and safe operation of snap switches in typical electrical installations.