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Test monthly -[ HMM ]- | by Carbon Arc
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Test monthly -[ HMM ]-

Buttons on a ground-fault-circuit-interrupter (GFCI) outlet, one kind of a class of devices also known as residual current devices.

 

The test button should be pressed monthly to confirm the unit works properly, but I wouldn't be surprised if regular testing is rarely performed, if ever.

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Taken on December 3, 2017