What is the function of a circuit breaker in an electrical panel?

A circuit breaker in an electrical panel acts primarily as a safety device designed to protect electrical circuits from damage caused by overloads or short circuits. When the current flowing through the circuit exceeds a predetermined level, the breaker automatically interrupts the flow of electricity. This interruption helps prevent overheating of wires, which could lead to electrical fires or equipment damage.

The design of circuit breakers allows them to reset after they have tripped, restoring power once the fault is corrected, which is a key advantage over fuses that must be replaced after they blow.

The role of circuit breakers is crucial for maintaining electrical safety in residences and commercial buildings, ensuring that the electrical system operates within safe limits and thus protecting both the infrastructure and the occupants.