Residual Current Circuit Breaker, or RCCB in short, could prevent any unnecessary and unfortunate death in your family. RCCB is a device in your house that detects and measures current leakage. It is installed in the electrical distribution box inside your house.
You might find a ELCB (Earth Leakage Circuit Breaker) in your house instead. ELCB is old technology and is obsolete in the market. It is advised you replace them if you find one.