KnowraResidual-current deviceLinked fromLinked fromThe 10 pages that link to Residual-current device, each with the reason it gives.All 10Related 6Compared with 4Ground-fault circuit interrupterRelated: It uses the same leakage-current principle as a GFCI, with terminology common outside North America.Mains electricityRelated: It helps protect people from electric shock caused by current leakage.Earth (electrical engineering)Related: It can detect leakage to earth even when fault current is too small to trip an overcurrent device.AC power plugs and socketsRelated: It can reduce shock risk when current escapes through a person or another unintended path.Distribution boardRelated: It detects earth-leakage current and can protect several circuits supplied by the board.Earth-leakage circuit breakerRelated: Modern earth-leakage protection commonly uses this differential-current principle.