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#177750 - 05/11/08 09:55 AM
A puzzel for Henry C
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Member
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Registered: 03/10/05
Posts: 367
Loc: Elkhart, IN. USA
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Since many enjoyed the puzzle Henry posted the other day I thought I would add one that had me stumped.
A few years ago (NEC 1999) a contractor called me to check out a problem with a new inground swimming pool.
The problem was that the GFI receptacle kept tripping.
He then went to the sub panel and showed me that the breaker for the receptacle was in the OFF position. We then reset the receptacle and it tripped, with the breaker off.
What do you think was causing it ?
_________________________
Alan--
If it was easy, anyone could do it.
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#177751 - 05/11/08 10:14 AM
Re: A puzzel for Henry C
[Re: Alan Nadon]
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Registered: 07/08/07
Posts: 503
Loc: Alaska
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Since it was in the 'off' positon and not the 'tripped' position, I'd say the breaker was defective
_________________________
"Good judgment comes from experience. Experience comes from bad judgment."
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#177754 - 05/11/08 10:27 AM
Re: A puzzel for Henry C
[Re: Alan Nadon]
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Member
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Registered: 11/11/05
Posts: 188
Loc: UPPER DARBY, PA, USA
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Where was the sub-panel located, inside or out?
_________________________
HENRY J. CARATURA
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#177758 - 05/11/08 11:20 AM
Re: A puzzel for Henry C
[Re: HCE727]
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Member
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Registered: 07/20/04
Posts: 4127
Loc: Estero,Fl,usa
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Shared neutral.
_________________________
Greg Fretwell
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#177768 - 05/11/08 06:55 PM
Re: A puzzel for Henry C
[Re: gfretwell]
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Member
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Registered: 02/16/02
Posts: 1065
Loc: Boonton, NJ
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My 2 cents on this puzzle.
If the breaker was OFF and the GFI receptacle had power but tripped the test/trip buttons on the receptacle, then the breaker must be defective.
If the breaker was OFF and you couldn't rest the test/trip buttons on the GFI receptacle, maybe you needed power in order to reset the buttons on the receptacle.
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#177771 - 05/11/08 07:07 PM
Re: A puzzel for Henry C
[Re: harold endean]
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Member
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Registered: 03/11/04
Posts: 264
Loc: Regina, Sask.
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It must be interesting or it wouldn't be posted here. I'll guess hot and neutral reversed.
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#177778 - 05/11/08 09:41 PM
Re: A puzzel for Henry C
[Re: twh]
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Member
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Registered: 10/25/06
Posts: 498
Loc: Lorton, VA, USA
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My guess is that the load side of the GFI receptacle is being backfed from another circuit.
_________________________
---Ed---
"But the guy at Home Depot said it would work."
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#177786 - 05/12/08 04:36 AM
Re: A puzzel for Henry C
[Re: EV607797]
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Member
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Registered: 03/19/05
Posts: 950
Loc: Chesapeake, VA
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It was tripping from current through the neutral and a neutral-ground fault.
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#177795 - 05/12/08 09:16 AM
Re: A puzzel for Henry C
[Re: SteveFehr]
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Member
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Registered: 03/10/05
Posts: 367
Loc: Elkhart, IN. USA
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Breaker was in a sub panel located indoors near the pool.
The breaker was in the OFF position, not tripped.
When the reset was pushed ON the receptacle it would quickly trip.
The receptacle was on a dedicated circuit, no shared neutral.
Additional Information.
Thinking that the breaker was defective the black wire to the breaker was disconnected.
The GFI receptacle was reset*, and then tripped !
*Older GFIs could be reset with the power OFF.
Alan Nadon
_________________________
Alan--
If it was easy, anyone could do it.
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#177799 - 05/12/08 10:34 AM
Re: A puzzel for Henry C
[Re: Alan Nadon]
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Member
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Registered: 01/08/06
Posts: 34
Loc: San Diego Ca USA
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Panel connections wrong/bad? Rod
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