I don't know too much about replacing outlets, only what I've read online or through YouTube videos. The house was built in the early 50s. Some outlets have been replaced (brand new kitchen) but some are still the old 2 prong. I bought a receptacle tester and tested the newer style outlets, which all tested as correct wiring. Upon opening and inspecting, none of these new 3 prong outlets had no ground wires. Does this mean the boxes are already somehow grounded? I'm even more confused now that the receptacle tester said that they were correct. Please help!
Electrical – 2 prong to 3 prong outlet help
electricalgroundingreceptaclewiring
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Best Answer
There are only 2 correct and safe ways to add a 3-prong outlet where formerly there was only a 2-prong one*:
There are many wrong ways to add a 3-prong outlet, most of which are dangerous and some of which are hard to spot or test for:
*There are actually a few other ways to ground an outlet safely, e.g. with armored cable with a bonding strip or a grounded box plus an outlet that allows grounding through the strap. But those are both pretty uncommon.