Residual-current device
= Residual-current device
{wiki=Residual-current_device}
A Residual Current Device (RCD), also known as a Residual Current Circuit Breaker (RCCB) or Earth Fault Circuit Interrupter (EFCI), is a crucial safety device used in electrical systems to prevent electric shock and reduce the risk of electrical fires. It functions by monitoring the electrical current flowing through a circuit.