Note: This rule applies only when the circuit breaker is used as the switch. If a general-use snap switch or contactor is used to control the lighting, this rule doesn't apply. UL 489, Standard for ...

Figure 2 Load switch with circuit breaker protection. To understand how the circuit works, assume that INPUT is high, Q2 is on, and normal current is flowing in the load. Under these conditions, the ...

Circuit breakers came into vogue around the 1940s and have become more or less the standard for electrical safety in all buildings. If you open up the electrical box in your home and see a bunch ...

The circuit breaker is one of the most important but least understood parts of your home electrical system, keeping you safe from electrical fires. Appliance Science looks at how they work.