Today I went to an old house to check some lights and receptacles not working. It turned out that the breaker tripped. I pulled it back and lights working. The breaker reading is 115v. And I used a receptacle tester shows the receptacle correct. But voltage reading between hot and neutral is 90. To ground is 10v. And all the lights chargers/vacuum are working.The weird things as long as I turn on the ceiling fan, the voltage back to 100v,I turn it off it back to 90v
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