How To Properly Ground A 2 Prong Outlet
If not continue to the next test.
How to properly ground a 2 prong outlet. Place one lead into the hot port on the receptacle then put the other lead onto the metal box or plate screw. Steps for replacing two prong electrical outlets. This was unreliable as many outlets did not have a ground wire for safety.
Initially outlets did not have a ground slot. Check for ground insert one prong of a circuit tester into the receptacle s hot slot the shorter one and touch the other to a screw that secures the cover plate. Testing for ground on 2 slot polarized receptacles once you verify that you have power remove the probe from the longer slot and touch it to the screw in the center of the cover plate.
Insert one of the tester s prongs into the hot slot the shorter slot in the outlet. Grounding a 2 wire outlet properly requires the addition of a ground wire. If it reads 120v or whatever you re normally reading between the hot and neutral you ll know there s a ground there.
Run the nm cable from the panel to the location of the outlet. If the outlet only has 2 prongs use a multimeter. Disconnect the hot wire which is black from the existing outlet and connect it to the brass line terminal on the gfci.
If it does not the box is not grounded. About your only recourse in such a situation is to install one of the new ground fault circuit interrupters gfcis. An adapter with a wire that connected to the outlet cover screw provided a ground connection.
To find out whether the metal housing is grounded purchase a circuit tester. If the tester lights up or registers the outlet is grounded and wired correctly. If you re wondering how to ground a 2 prong outlet the answer is that you can t really because the outlet has no place to receive the ground wire.
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