when equipped with this improvement , a gound fault circuit interrupter will continue to monitor its protected circuits after tripping and automatically reset itself to restore power when no fault conditions are detected or when detected faults do not exceed a predetermined conduction level and are determined to be non - hazardous . the reset circuit shunts the tripped gfci relay to pass a safely limited test current into the otherwise disconnected circuits of electrical utilization devices to determine the absence or the extent of fault conditions and is substantially fail - safe in regard to its own function . four of the embodiments show the circuit as incorporated into the circuitry of an electrically resettable gfci and a fifth as contained within an attachable enclosure .