The Federal Pioneer Ground Fault circuit interrupter protects people against electrical shocks. GFCI protection is required in wet or damp areas such as bathrooms, kitchens, garages, spas, pools and outdoor receptacles. Do not connect to more than 250 feet of load conductor for the total one-way run to prevent nuisance tripping. Provides overload, short circuit protection combined with Class A ground fault protection. Class A denotes a GFCI that will trip when a fault current to ground is 5 milliamps or more. 10,000 Amperes Interrupting Rating (AIR). Red push to test button.