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#119846 - 02/03/05 05:56 PM Breaker Trips after Half-Hour Delay
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Registered: 10/07/00
Posts: 3184
Loc: NY, USA
Quote:
I went to troubleshoot a tripped breaker, and after taking all the load off of the circuit and putting on one lite at a time, I still could not narrow it down to any one thing. I did find that someone had used a ground for a neutral for the return of about 4amps for some lites(It was done so the homeowner would have a 3way) After about 3 hrs of tracing each wire, this is what was found in a boxed out a/c return.

- richard





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#119847 - 02/03/05 06:55 PM Re: Breaker Trips after Half-Hour Delay
Dave55 Offline
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Registered: 05/08/04
Posts: 666
Loc: Crystal Lake, Illinois, USA
From the second picture it looks like a nail pierced the NM. Is this what you think happened?

Dave

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#119848 - 02/04/05 02:00 PM Re: Breaker Trips after Half-Hour Delay
richard Offline
Member

Registered: 08/07/03
Posts: 84
Loc: L.I. New York
Yes, or a staple. There was a staple next to it. I might have smelled it burning, but the heat was set at about 80, and the return was constantly pulling the air in. They are really lucky.

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#119849 - 02/04/05 02:41 PM Re: Breaker Trips after Half-Hour Delay
cpal Offline
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Registered: 05/17/04
Posts: 165
Loc: Cohasset MA
Was that a bed room circuit????

Charlie

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#119850 - 02/04/05 03:32 PM Re: Breaker Trips after Half-Hour Delay
richard Offline
Member

Registered: 08/07/03
Posts: 84
Loc: L.I. New York
It was in the dining room wall, they had a pipe on the secound floor burst, and the water made its way to the hole in the wire. As the connection between the hot and the ground/neutral was made, the wire heated and the breaker tripped.I think the water could have bubbled, and thats why it took so long to trip.

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