Ground fault interrupter tester

摘要

A hand-held ground fault interrupter for checking the operation of a ground fault protected wall receptacle. The blades of an electrical terminal protrude from one end of a housing which contains a potentiometer and electrical connecting means between the potentiometer and the blades. The tester creates a ground fault by allowing current to leak to the ground path, the amount of leakage varied by the potentiometer. A properly operating ground fault interrupter senses the leakage and is designed to trip when it sees a selected level of current leakage. Tripping at lower levels or failure to trip at higher levels indicates a defective interrupter. Recesses in the sides of the housing provide access to the potentiometer dial for rotating the dial and reading a label affixed thereto.