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Finding live buried wires? #217027
04/05/16 03:50 PM
04/05/16 03:50 PM
P
Panterawill  Offline OP
New Member
Joined: Mar 2016
Posts: 2
Ontario
Hey guys. Hope you can help me.
I have a home that definitely has a buried junction box in the drywall. The wires are live and are feeding a chandelier and pot lights. Some load, but not a huge amount.
Its an expensive home and I don't want to start poking holes in the drywall.
Thermal gun? I spoke to a person in the field and he said it wouldn't pick it up unless there was a massive load or bad connection creating a lot of heat.
Any suggestions for electronic tracing devices?
Thanks in advance

Work Gear for Electricians and the Trades
Re: Finding live buried wires? [Re: Panterawill] #217028
04/05/16 05:44 PM
04/05/16 05:44 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,964
Brick, NJ USA
You may want to check this out.....

http://www.amprobe.com/Amprobe/usen/Products/Wire-Tracers.htm

I had some success with the old model back in the day. Note that I say 'some'.

Could you drop the trims in the recess fixtures??



John
Re: Finding live buried wires? [Re: Panterawill] #217029
04/06/16 02:30 PM
04/06/16 02:30 PM
G
ghost307  Offline
Member
Joined: May 2005
Posts: 943
Chicago Illinois USA
If it's a metal junction box that's buried a stud finder should have some reaction.
Generally it detects the increased density of the wood but there's a chance that it would also give some lesser indication when it encounters a metal box between studs.
Once you narrow it down you can drill a small hole and look inside the wall with a borescope to try to get the exact location.


Ghost307
Re: Finding live buried wires? [Re: Panterawill] #217032
04/08/16 10:52 PM
04/08/16 10:52 PM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,236
SI,New Zealand
I had a job that was very similar to this some years back.
Not wanting to buy a proper metal detector, I made up a small oscillator that had a coil of wire on a plastic former attached to it, after some initial workshop testing, I took out to the job, long story short, it took a matter of seconds to find the offending joint.
It's pretty poor form joining stuff in a wall though, all the same.

Re: Finding live buried wires? [Re: Panterawill] #217035
04/10/16 08:48 AM
04/10/16 08:48 AM
T
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,425
Vienna, Austria
I love my tone tracer! It even works with wires inside Bergmann conduit (Orangeburg pipe with a thin outer coating of sheet metal, not earthed) in plastered brick walls. I only have a rather inexpensive one, 85 Euros. Allowed me to spot a buried splice +/- 1 cm! Some moron moved a door (and light switch) by just splicing new wires to the old cloth-covered ones and plastering over the old switch box. I found the splice, patched in a new section of flex conduit instead of the box, pulled new wires through the now complete conduit run and that was it.

Re: Finding live buried wires? [Re: Panterawill] #217083
04/30/16 09:02 PM
04/30/16 09:02 PM
L
lesk  Offline
New Member
Joined: Jan 2016
Posts: 2
new jersey
Yes the Amp detector worked well for me

Re: Finding live buried wires? [Re: Panterawill] #217090
05/01/16 06:29 PM
05/01/16 06:29 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,964
Brick, NJ USA
lesk
Welcome to ECN from another Jersey guy....


John

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