Replacing overhead light. Questions about identifying wires and ground

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Old 11-18-18, 11:13 AM
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Replacing overhead light. Questions about identifying wires and ground

I just purchased an overhead light for our dining room that has two wires connected together in plastic plus a separate ground. The two wires in plastic though are identical. There are no markings on plastic etc. so how do I do I know which to connect to my hot wire? The salesperson at store said they were interchangeable and either could be connected to hot but wanted to make sure.

Also, I have no ground wire coming out of the box. To test whether the box is grounded, I used a multi meter (one pole on live hot wire and other touching green ground screw) and the result I'm getting is negative one. Does that mean box is not grounded and requires an electrician to come in?

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Old 11-18-18, 11:31 AM
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You have a meter..... that's good. Set it to the ohms scale. Put one probe on the center light bulb socket pin and then to either of the two wires. The one that shows continuity is the hot wire. The other will show continuity to the shell of the light bulb socket. That is neutral.

You should be using the 120vAC scale to check for ground.,
If there is no ground at the ceiling box..... just leave the ground wire coiled up in side the box.
 
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Old 11-18-18, 11:52 AM
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Much appreciated. Thank you!
 
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Old 11-18-18, 04:07 PM
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For the light, either wire can go to got.
just make sure the ground wire is used for ground.
 
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Old 11-18-18, 04:31 PM
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As Qwerty alluded, the bulb will light either way, but what PJ said is the way that it should be. The hot wire should go to the center and the neutral to the threaded base, and it only takes a few seconds to verify and do it correctly.
 
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