Posted by Janicholson on February 21, 2014 at 10:30:39 from (199.17.6.25):
In Reply to: Electrical Problems posted by John M on February 21, 2014 at 04:02:53:
The issue Is a failing neutral. It can be found only when under load (a 1500 watt 120v space heater being the only thing turned on in the whole house). The way to find it is to use a good meter on one of the two 120v circuits at the panel, and then a circuit on the opposite phase. Under load, the voltages will be different. This is because the neutral connection is required to conduct the unbalanced load on the 220 single phase service. I had the issue. I used a Fluke meter on the input to my house at the load center main breaker input. 96 on one circuit, 139 on the other. I went to a neighbor and measured their ac with the same result. I called Excel Energy one minute later and told them (a woman in Texas) that there was an emergency electrical over voltage. After several escalations I managed to talk to a local (real) technical person. He said how did you measure it? I told him I used a Fluke digital with government certification stickers. He said they would be right out. They were. they used a laser aimed infrared sensor to check conductors at the distribution transformer and found a neutral clamp at 1650 volts that was glowing red. They hot jumped that clamp and removed it cleaned and replaced it. No more issue. Yours could be anywhere from the neutral wire leading into your distribution panel, to the transformer you use, to the transformer used to take it to medium distribution. Others not being affected, I suspect between your panel and the 220v transformer. Jim
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