Electrical Wiring in the Home/loss of power on 2nd floor

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Question
now its gotten strange--as I wrote you I have an extension cord from living room to provide power to 2nd floor until it is repaired-what I did not tell you is that I am a kidney dialysis patient, we do it at home, the machine is in the 1st floor bedroom on the same breaker as the living room, all upstairs, and basement lights so we are really concerned about all that on same breaker, if it were to trip while I was hooked to the machine-since power just went out-we figured it was a good time to relocate it on to another breaker-temp, I decided instead of outlet in living room on same breaker, I would run extension cord down exhaust vent to basement and plug in in outlet on different breaker-when I unplugged cord, I discovered it was "live" electricity coming to cord from attic instead of the reverse-I tried the lights-somehow our power came back on 2nd floor by itself-(maybe all the "messing" I did "bumped" something???)this suggest I was wrong about the line I thought was the main feed as it is still disconnected-but if there was power to the cord and I had it plugged in a live outlet, should not it had shorted out??? now I have to go back in attic and try to figure out the real main lead as for reasons I wrote we really should put 2nd floor on another breaker

Answer
Wouldn't blow up if fed from same panel bus segment
(Same side of trsnsformer)
Sounds like a bad splice or a burned connection at a device
Turn it off and pull all devices and fixtures until you find the failed location
It might be at a receptacle where the wire is slipped into the little hole instead of spliced or landed on the screws
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Electrical Wiring in the Home

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Robert Wilber

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Licensed Philadelphia electrician serving Delaware, Chester, Montgomery and Philadelphia County in Pennsylvania. I install and repair residential, commercial and industrial wiring and lighting. Troubleshooting and repair of problems that stump other people is my favorite. I am willing to help people figure out why things don`t work. I understand motor controls, transformers and machine wiring. I do not teach basics to novices or do free design work.

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Experience in the area I have 44 years experience in residential, commercial and industrial electrical construction and repair, 480 volts and below. This is not to be confused with one week repeated two thousand times.

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44 years experience in residential, commercial and industrial electrical construction and repair

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