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Old 01-15-2008, 04:12 PM   #1
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Tracking down a cct


I need to track down a wire that is not powered. It is in a new construction. It is not hooked to the breaker box or anything on the other end. I know there is a way to do it with a multi meter, but am not sure how. Can anyone please explain to me how to do this?

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Old 01-15-2008, 05:13 PM   #2
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Tracking down a cct


Sure. Take one end of the wire. Attach black to ground with a wire nut. Choose continuity on your meter. Go around and test from black to ground. It will indicate, in some way, that you have completed a full circle (continuity). My meter squeals like a pig .

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Old 01-15-2008, 05:16 PM   #3
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Tracking down a cct


Here is one method.

If this is part of a dead circuit with receptacles and lights already on it, switch to off all of the built in lights and unplug everything from the dead receptacles.

Set the meter to 240 volts. Verify that there is indeed no voltage from the far end of the wire to ground (at the subject or nearest outlet box.)

Now set the meter to ohms. You should measure infinite (sometimes shows as 1.00000 on digital multimeters) between the wire and ground.

If you do get the infinite reading, go down to the breaker box and ground one of the loose incoming wires there at a time. When you read close to zero ohms on your multimeter still connected at the far end, you have found the corresponding end of your subject wire at the breaker box.
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Old 01-16-2008, 07:07 AM   #4
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Tracking down a cct


Quote:
Originally Posted by Andy in ATL View Post
Sure. Take one end of the wire. Attach black to ground with a wire nut. Choose continuity on your meter. Go around and test from black to ground. It will indicate, in some way, that you have completed a full circle (continuity). My meter squeals like a pig .

I think this is the method I heard about...



Thanks guys.
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