GFCI Trip Test: This socket checker detector has a GFCI trip test function, which allows you to press the test button GFCI to trip (test) the circuit if it has a ground fault detector. Multifunctional: This GFCI outlet tester is multifunctional and can detect the most common wiring faults, open ground, open neutral, thermal ground reversal, thermal neutral reversal and open ground in GFCI power outlets.
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