What is the purpose of a circuit breaker?

The purpose of a circuit breaker is primarily to prevent overload and electrical fires. Circuit breakers are safety devices designed to interrupt the flow of electrical current in a circuit when it detects an overload or a short circuit condition. By tripping and opening the circuit, they help to prevent excessive current that could generate heat and potentially ignite nearby combustible materials, leading to electrical fires.

Each circuit breaker is rated for a specific load; if the electrical current exceeds this load, the breaker automatically disconnects to safeguard the electrical system and prevent damage not only to the wiring but also to connected appliances and devices. This critical function makes circuit breakers essential components for ensuring safety in residential and commercial electrical installations.