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Old 04-09-2011, 07:06 PM   #1
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Dead circuit problem


I was changing a light fixture in a bedroom and tripped the breaker (should have turned off breaker instead of just the light switch but i was recording something on TV). Anyway, i finished with the light and flipped the breaker back on but no light?

Everything on this circuit is out.
I turned the breaker off and on and still no power to outlets or lights.
I checked load side of breaker and there is power, but still no power to any fixture or outlet.
I took the breaker out and checked continuity thru the breaker, re-installed, checked for power again on load side and everything is good with breaker.

I have no other sub panels or fuses or breakers. I can not trace the wire as it goes into ceiling and walls.

Do you think there is a connection in a J-box somewhere that might have burned when i tripped the breaker? The breaker trip was quick and no big sparks or anything.

My house is built in 1950's and has no knob and tube and i had the main panel upgraded 5 years ago if that might help.

Any suggestions are appreciated

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Old 04-09-2011, 09:00 PM   #2
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Dead circuit problem


sounds like the breaker is bad. have you tried replacing it or checking to see if voltage is at the output of the breaker when it is on?

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Old 04-09-2011, 09:29 PM   #3
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Dead circuit problem


What else is on the circuit? Could there be a GFCI somewhere?
Check the neutral. You have hot power at breaker but maybe no neutral connection. Try and trace the cables from the breaker and find the open connection.
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Old 04-09-2011, 10:51 PM   #4
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Dead circuit problem


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Originally Posted by housepoor View Post
I checked load side of breaker and there is power,
How or what did you use to check power at the breaker?
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Old 04-10-2011, 01:30 AM   #5
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Dead circuit problem


Did you put everything back together the way it was in the light box? Check connections? Alot of old wiring the feed is ran into the light and switch looped to the switch,outlets.
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Old 04-10-2011, 01:43 AM   #6
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Dead circuit problem


I checked the breaker with a meter. I have 120V on the load side of the breaker. I also removed the breaker and checked for continuity through the breaker with switch on and off. I had an extra breaker and replaced it, because it makes no sense why i would have power on the load side of the breaker and no power at the outlets.

DO you think the trip off the breaker could have made one of the wires burn up? I don't think it would be possible? I have a friend who is electrician and said it was an odd problem but he would not be able to come over for atleast another day or two.

Any suggestions are appreciated.
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Old 04-10-2011, 01:47 AM   #7
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Dead circuit problem


Check what I posted
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Old 04-10-2011, 01:47 AM   #8
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Dead circuit problem


Actually the when i removed the old light i found that there was no box in the ceiling. Just a wire sticking out of the sheetrock. I installed an old work 4 inch round box and hooked up the light.
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Old 04-10-2011, 01:53 AM   #9
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Dead circuit problem


Only 1 wire?
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Old 04-10-2011, 02:03 AM   #10
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Dead circuit problem


I checked the breaker with a digital multi meter. Probe on screw of breaker that holds wire and other probe on neutral bus. 120V when breaker is on and 0V when breaker is in off position. I even pulled the breaker out and disconnected and checked continuity through breaker in on position and no continuity in off position.
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Old 04-10-2011, 02:05 AM   #11
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Dead circuit problem


Quote:
Originally Posted by housepoor View Post
Do you think there is a connection in a J-box somewhere that might have burned when i tripped the breaker? The breaker trip was quick and no big sparks or anything.
d
based on what you have said so far, I would suspect exactly that. Time to start mapping that circuit.
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Old 04-10-2011, 02:08 AM   #12
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Dead circuit problem


No, White (neutral), Black, red and ground. The black was used the control the light and the red was used to control a fan that was there previously. I removed the ceiling fan/ light 2 weeks ago and then went away. Everything was fine when i was away and the light was disconnected. After i tripped the breaker the problem has started. I have the new light completely disconnected just as it was before i started this project.
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Old 04-10-2011, 02:10 AM   #13
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Dead circuit problem


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Originally Posted by nap View Post
based on what you have said so far, I would suspect exactly that. Time to start mapping that circuit.
Thanks for the reply. I was hopeful that there might be another easier solution, but i think you may be right.
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Old 04-10-2011, 06:34 AM   #14
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Dead circuit problem


A dead short like that frequently will kill a dimmer switch---have you checked the switch box for power?

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