A.Master electrician Rex Cauldwell responds: This has to be a utility problem: low voltage or too great a load for the available voltage. There is no other way your chop saw would be able to affect the house across the street. Probably both houses are working on the same transformer, and the transformer is underpowered. If you are on different transformers, then the utility really has a problem. It means that their high-voltage line is overextended -- in other words, there are too many homes on that particular tap.

The "bad neutral" theory doesn't add up. A service entrance connection (SEC) neutral problem gives a whole set of different problems. Every house has two energized lines into the house and a neutral that either hot line can use. When an SEC neutral goes bad, one of the hot legs to the house goes high, and the other leg goes low. In the...

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