The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Members: Non-Members: Did you know?
by Admin
Today at 02:34 PM
Safety at heights?
by HotLine1
Yesterday at 08:51 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 03:29 PM
Looking for older post
by Texas_Ranger
Yesterday at 03:22 PM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 36
HotLine1 20
Ruben Rocha 17
gfretwell 16
Trumpy 15
Who's Online
1 registered (Admin), 83 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#177750 - 05/11/08 08:55 AM A puzzel for Henry C
Alan Nadon Offline
Member
Registered: 03/10/05
Posts: 398
Loc: Elkhart, IN. USA
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.
Top
Work Gear for Electricians and the Trades
#177751 - 05/11/08 09:14 AM Re: A puzzel for Henry C [Re: Alan Nadon]
sparkyinak Offline
Member
Registered: 07/08/07
Posts: 1308
Loc: Alaska
Since it was in the 'off' positon and not the 'tripped' position, I'd say the breaker was defective
_________________________
"Live Awesome!" - Kevin Carosa
Top
#177754 - 05/11/08 09:27 AM Re: A puzzel for Henry C [Re: Alan Nadon]
HCE727 Offline
Member
Registered: 11/11/05
Posts: 190
Loc: Delaware County, PA, USA
Where was the sub-panel located, inside or out?
_________________________
Hank
Top
#177758 - 05/11/08 10:20 AM Re: A puzzel for Henry C [Re: HCE727]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9066
Loc: Estero,Fl,usa
Shared neutral.
_________________________
Greg Fretwell
Top
#177768 - 05/11/08 05:55 PM Re: A puzzel for Henry C [Re: gfretwell]
harold endean Offline
Member
Registered: 02/16/02
Posts: 2248
Loc: Boonton, NJ
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.
Top
#177771 - 05/11/08 06:07 PM Re: A puzzel for Henry C [Re: harold endean]
twh Offline
Member
Registered: 03/11/04
Posts: 899
Loc: Regina, Sask.
It must be interesting or it wouldn't be posted here. I'll guess hot and neutral reversed.
Top
#177778 - 05/11/08 08:41 PM Re: A puzzel for Henry C [Re: twh]
EV607797 Offline
Member
Registered: 10/25/06
Posts: 756
Loc: Fredericksburg, VA, USA
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."
Top
#177786 - 05/12/08 03:36 AM Re: A puzzel for Henry C [Re: EV607797]
SteveFehr Offline
Member
Registered: 03/19/05
Posts: 1192
Loc: Chesapeake, VA
It was tripping from current through the neutral and a neutral-ground fault.
Top
#177795 - 05/12/08 08:16 AM Re: A puzzel for Henry C [Re: SteveFehr]
Alan Nadon Offline
Member
Registered: 03/10/05
Posts: 398
Loc: Elkhart, IN. USA
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.
Top
#177799 - 05/12/08 09:34 AM Re: A puzzel for Henry C [Re: Alan Nadon]
venture Offline
Member
Registered: 01/08/06
Posts: 37
Loc: San Diego Ca USA
Panel connections wrong/bad? Rod
Top
Page 1 of 2 1 2 >


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals