What happens when a circuit is overloaded?

When a circuit is overloaded, the circuit breaker is designed to interrupt the electricity supply to protect the wiring and connected devices from damage. Overloading occurs when too much current flows through the circuit, exceeding its designed capacity. This can lead to overheating and potentially cause insulation breakdown or fire hazards.

To prevent such dangerous situations, circuit breakers are equipped with thermal or electromagnetic mechanisms that detect excessive current flow. When an overload is detected, the breaker trips and disconnects the circuit, effectively cutting off the electricity supply. This protective action ensures that the wiring and devices remain safe from damage due to overheating or other risks associated with overcurrent conditions.

In contrast, if the circuit were to continue operating normally, remain inactive, or experience an increase in voltage, it would not effectively manage the dangers associated with overloading, leading to potential equipment failures or safety hazards.