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#217079 - 04/29/16 02:12 PM Tracking Live wires .
Yoopersup Offline
Member
Registered: 03/04/03
Posts: 822
Loc: Michigan
What do they make that you can trace a wire from Device or Motor to the Panel to get the correct circuit without shutting the power off. Some of the loads run 24/7 And are not marked correctly.
Both 3 phase & single phase.
Thank you
Yoopersup
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#217080 - 04/30/16 12:29 AM Re: Tracking Live wires . [Re: Yoopersup]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9036
Loc: Estero,Fl,usa
There are breaker finders that insert some kind of signal on the wire that you can pick up with the tester at the breaker end. The one I have is 120v only tho (a wall wart looking sender). I put a 1-15 receptacle on a pigtail with some insulated clips so I can use it on a circuit without a receptacle handy.
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#217081 - 04/30/16 09:22 AM Re: Tracking Live wires . [Re: Yoopersup]
twh Offline
Member
Registered: 03/11/04
Posts: 901
Loc: Regina, Sask.
I tried a couple different tracers that are plugged into an outlet and have had some success and some failures. When I'm turning off a plug circuit that really has to be right, I built a box with a 4 amp cycling load so I can verify the circuit with a clamp-on ammeter.

A telephone toner will work on a dead circuit.
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#217082 - 04/30/16 04:36 PM Re: Tracking Live wires . [Re: twh]
brsele Offline
Member
Registered: 07/29/08
Posts: 88
Loc: Northern Ontario
Originally Posted By twh
I tried a couple different tracers that are plugged into an outlet and have had some success and some failures. When I'm turning off a plug circuit that really has to be right, I built a box with a 4 amp cycling load so I can verify the circuit with a clamp-on ammeter.


So can I ask what do you use for cycling?
I've been looking for one of those flashers people used to use at Christmas, but they don't sell them where I am.

Thanks
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#217085 - 04/30/16 11:00 PM Re: Tracking Live wires . [Re: brsele]
twh Offline
Member
Registered: 03/11/04
Posts: 901
Loc: Regina, Sask.
For a cycling load, I have a couple magnetic heaters inside a 10x10 JB with a heat sink from an old VFD opposite the heaters. They cycle on for about a second and off for about 3 seconds.

It takes about one second for an ammeter to give a good reading. The off time is longer to reduce the heat.

I have an ammeter with forks that slip over the wires so I don't have to clamp on to each wire.

Sometimes the panel feeders have a steady enough load that the phase can be determined, which reduces the number of tests on breakers.

This is a result of an incorrectly labelled breaker that the circuit tracer also incorrectly identified. It's a funny thing. If the power goes out on computers, everyone goes outside for a smoke. If an electrician makes a mistake, they want to see blood on the walls.
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#217088 - 05/01/16 10:43 AM Re: Tracking Live wires . [Re: Yoopersup]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9036
Loc: Estero,Fl,usa
Quote:
It's a funny thing. If the power goes out on computers, everyone goes outside for a smoke.


Trust me, when the computers are down, there are still plenty of people who want to see some blood on the wall. wink
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#217092 - 05/01/16 08:39 PM Re: Tracking Live wires . [Re: Yoopersup]
Yoopersup Offline
Member
Registered: 03/04/03
Posts: 822
Loc: Michigan
Most the Loads I am talking about are 3 phase 480 v motor loads.
120 Volt loads are not a problem/
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