Circuit breakers are safety devices that can switch off the electrical supply in a circuit when the current flowing is greater than its current rating. Without circuit breakers, a surge of current can actually damage home appliances or even cause a fire.
Points to take note
(1) Circuit breakers can be easily reset but it should be done only after the electric fault is corrected. If no, it will cause the circuit breakers to trip again.
(2) Circuit breakers must be connected to live wire.
When the current flowing exceeds the current rating, a circuit breaker on live wire will trip and cut off the electrical supply to the home circuit.