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Old 06-10-2012, 12:00 PM   #1
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Greetings All,

First of all, I respect what you do and I respect this forums rules.


This is a DYI post in sorts and if you feel this goes outside of the rules, I beg you to please direct me to the best source of accurate info. Thus far all I seem to find is other DIY'ers with bogus ideas and zero information.

I thank anyone who is willing to offer advise.

My issue is this:

I am helping an elderly lady with a mobile home she owns but does not live in. It belonged to her daughter who abandoned the place and now she's stuck trying to fix/clean/sell the place.

She had the utility come and turned the power on. When we flipped the main breaker, the power came on (ac included) for about 4 seconds. It then shut off. I shut the main off and went to thermostat to turn the AC off and then turned the main back on. There was no power anywhere in the house. I went to the thermostat and turned the AC on and the power came on in the whole house. Several times I shut the AC off and the power goes out....Turn AC on and the power comes back on.

The thermostat was for some reason just hanging out of the wall by the wires. There were only two wires connected but I saw a spot for three wires. I unhooked, cleaned the wires up, connected all three wires and screwed the thermostat back to the wall. Turned on the main breaker again and bingo...AC & power that stays on.

They go over to the house today and turn the AC down to 70. (I had turned it up so it didnít run while no one was there). As soon as the temp reached 70 in the house, the AC kicked off and three rooms lost power while the rest of the house stayed on.

We called 2 Electricians and they both said it's not the house, its a ground issue with the utility. We called the utility and they came out and said its not a ground issue, its something in the house.

Any ideas of what I can do or check?!

Again, I know this is DIY but I thought it would be an interesting read for you all and I HOPE to gather some info out of it.

Thanks again!
JS
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Old 06-10-2012, 12:05 PM   #2
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Old 06-10-2012, 12:06 PM   #3
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Youve lost a phase. Comimg into the house
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Old 06-10-2012, 12:14 PM   #4
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Check at the main connection line side. sounds as though you have lost 1 hot at the main. check load side of main breaker.
Hope that helps, if not get in touch with electrician, we can usually solve the unsolvable
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Old 06-10-2012, 12:15 PM   #5
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I will call the utility back out and see if they can address the issue. All he checked was the ground because thats what I relayed from the folks we had come out to check the house.
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Old 06-10-2012, 12:17 PM   #6
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Thanks for the tips! I did try the "call an electrican" before bothering you folks. We had two different guys out there but both agree'd that it had to be a grounding issue with the utility...which of course said no it's not.
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Old 06-10-2012, 12:42 PM   #7
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Quote:
Originally Posted by stormin82 View Post
Thanks for the tips! I did try the "call an electrican" before bothering you folks. We had two different guys out there but both agree'd that it had to be a grounding issue with the utility...which of course said no it's not.


Sounds like some quality electricians. If all else fails, blame it on utility grounding McClary nailed it; you've lost a phase leg coming in. When you turn the AC on you're backfeeding the missing phase.

Probably happening at: 1) The meter, 2) the main breaker location, or possibly 3) at the utility transformer.
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Old 06-10-2012, 12:49 PM   #8
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Or direct burial cabling
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Old 06-10-2012, 01:11 PM   #9
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Old 06-10-2012, 01:23 PM   #10
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the #10 wire fell out of the meter forks that where jumped
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Old 06-10-2012, 01:36 PM   #11
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Or a bad crimp at the house end of the service drop (POCO).
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Old 06-10-2012, 02:37 PM   #12
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