A Residual Current Circuit Breaker is another different class of Circuit Breaker. It is essentially a current sensing device useful to protect a low voltage circuit in case of a fault. It contains a switch device that switches off whenever a fault occurs in the connected circuit.
Purpose of RCCB:
It aims at protecting an individual from the risks of electrical shocks, electrocution, and fires caused due to faulty wiring.
It is particularly useful in situations where there is a sudden earth fault occurring in the circuit. For e.g. a person accidentally comes in contact with an open live wire in the circuit.
In such a situation, in absence of an RCCB in the circuit, an earth fault may occur and the person is at the risk of receiving an electrical shock.
However, if the same circuit is protected with RCCB, it will trip the circuit in a fraction of a second thus preventing the person from receiving an electrical shock. Therefore, it is a good and safe practice to install RCCB in your electrical circuit.
