A receptacle tester is a tool used to confirm that an AC wall outlet is wired correctly. It has a prong on one end to plug into the outlet, and lights on the other end that will light up in a particular pattern if the outlet is wired correctly.
A receptacle tester is a tool used to confirm that an AC wall outlet is wired correctly. It has a prong on one end to plug into the outlet, and lights on the other end that will light up in a particular pattern if the outlet is wired correctly.
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