Amprobe ST-102B Socket Tester with GFCI Amprobe ST-102B Socket Tester with GFCI Confirm proper wiring with one easy tool ST-102B The Amprobe ST-102B socket tester with GFCI is an outlet tester used to confirm the proper wiring of US and Canadian standard electrical outlets/sockets/receptacles and those wired with ground fault circuit interrupter (GFCI) in residential & industrial settings.
This rare indicator was made for the Military. What makes this indicator assembly special, it has 2 independent miniature bayonet sockets in one housing. It mounts in a 1 1/8" hole.
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