The Square D™ Homeline™ Equipment Protection Device (EPD) Circuit Breakers are 1 or 2-pole thermal magnetic circuit breakers with integral equipment ground-fault protection. Designed to protect equipment such as heat trace from damage (Class B per UL943), the ground-fault protection level is 30 mA. Homeline™ EPD Circuit Breakers mount in Homeline™ Load Centers occupying the same space as the standard Homeline™ Circuit Breakers. In addition, these circuit breakers provide branch circuit overcurrent and short-circuit protection (per UL489). The EPD Circuit Breakers include a black test button to test the ground-fault circuitry, as required by UL. Pushing the test button causes the circuit breaker to trip, placing the handle into the tripped (middle) position. The NEC allows the use of an EPD for heat trace, to prevent freezing of pipes, rain gutters, etc. Other applications include protection of equipment such as well pumps and other electrical equipment in the home or garage.