Ground fault circuit interrupter (GFCI) receptacle is designed to protect people from line-to-ground electrical shock hazards which may develop from faulty appliance, tools or defective portable cords if a ground fault does occur and the leakage level exceeds 4 to 6 mA, the GFCI unit quickly acts to protect the user by opening the circuit, thus interrupting the power supply and limiting the duration of any electrical current flow after tripping, the receptacle is reset by pushing a button on its face A test button allows the user to test that the GFCI is in working order.
