What does a circuit breaker do?

A circuit breaker serves a critical safety function within an electrical system by automatically interrupting the flow of electricity in the event of an overload or fault. This protective measure is essential for preventing potential hazards, such as electrical fires or equipment damage, that can occur when excess current flows through a circuit.

When an overload occurs, such as when too many devices draw power simultaneously, or in the case of a short circuit where current finds an unintended path, the circuit breaker detects the abnormal condition. It then opens the circuit, effectively stopping the flow of electricity and protecting both the wiring and connected devices from damage.

This automatic interruption is a vital aspect of modern electrical safety systems, ensuring that situations that could pose risks to both people and property are mitigated promptly and efficiently.