Describe the function of a circuit breaker in an electrical system.

The function of a circuit breaker in an electrical system is to protect electrical circuits from overloads and short circuits. When an overload occurs—meaning the current flowing through the circuit exceeds its safe capacity—the circuit breaker automatically interrupts the flow of electricity. This interruption prevents overheating of wires, which can lead to fires or damage to electrical components. Similarly, in the event of a short circuit, where a fault creates an unintended path for current flow, the circuit breaker acts quickly to disconnect the power and minimize hazards.

The mechanism of a circuit breaker is crucial in maintaining safety within an electrical system. It is designed to reset after a fault has been cleared, allowing the circuit to be re-energized once the issue has been resolved, which enhances operational reliability. Understanding this protective function is essential for anyone involved in electrical system installation and safety practices.