What is a switch rated in horsepower capable of interrupting?

A switch rated in horsepower is specifically designed to interrupt the maximum operating overload current of a motor. When a motor is operating, it typically draws a specific amount of current, and during starting or under overload conditions, this current can significantly increase. The horsepower rating of the switch indicates its capability to safely interrupt this overload current.

In the context of electrical installations, ensuring that a switch can handle the overload current is critical for safe operation. If the switch is not rated appropriately, it may fail to interrupt the current during an overload situation, leading to equipment damage or safety hazards such as fires.

The other options do not directly relate to the primary function of a switch rated in horsepower. While switches may have various ratings and operational characteristics, their horsepower rating primarily correlates to their capacity to manage and interrupt the overload current specifically associated with motors.