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#62619 - 02/22/06 06:07 AM Trouble with a sub-panel
Steven94134 Offline
Junior Member

Registered: 02/19/06
Posts: 1
Loc: San Francisco, CA, USA
I am currently working on a remodel on a residential property with multiple buildings. The main house was built pre-1906 with tube and knob system (2 hot and neutral). The building I am working on is a cottage located about 100 feet away from the main house where its electricity originates. The house's main panel has 4 double pole breakers, each feeding a sub-panel.
On the service are the three cables as expected. The three lines that feed the cottage travel through a plastic conduit up the side of the building, across to opposite end on the house and up to a gooseneck and back down another plastic conduit into the ground then ground where it travels under a swimming pool over to the sub-panel in the cottage. At the gooseneck there is an additional cable (green insulated which must be a ground).
The owners have been having problems with the electrical for some time and I have found numerous issues with the wiring and made those changes. I have replaced the sub-panel with a newer model. The 4 that enter the building are connected to appropriate spots, (the two hot cables to a 100 Amp circuit breaker, neutral to the neutral bus and the last to the ground bus. The neutral is un-bonded.
When tested the 2-poles test correctly but I also have 120 across the neutral and ground. I decided to add another grounding rod at the cottage to be sure that the sub-panel is in fact grounded but still have the same test results and when I use a plug tester on the receptacles I all three lights light up.
Any suggestions?

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#62620 - 02/22/06 06:19 AM Re: Trouble with a sub-panel
watthead Offline
Member

Registered: 10/13/01
Posts: 182
Loc: South Carolina
If you feel like you are over your head here you probably are. If you are a contractor, why haven't you called an electrician? You don't really want the liability on this one do you?

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#62621 - 02/22/06 07:01 AM Re: Trouble with a sub-panel
Radar Offline
Member

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
Ditto Watthead.
Quote:
but I also have 120 across the neutral and ground.

This can lead to a disaster, and right now, your name is on the liability list, even though you didn't cause the initial problem. You should call an electrician asap.

Radar
_________________________
There are 10 types of people. Those who know binary, and those who don't.

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#62622 - 02/22/06 07:27 AM Re: Trouble with a sub-panel
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
To add to Wattheads and Radars posts, a ground rod will have no effect on your problem, you need to get an electrician involved.

Roger

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