Voltage drop too much?

[kylelee]

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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[growler]

But voltage reading between hot and neutral is 90. To ground is 10v.

Loose or bad connection on the ground.

If your voltage reading are correct [voltage drop] I would suspect other loose connections.Maybe bad back stab connections or loose wire nuts. Check neutral and ground connections at the panel to start with.

 

[kwired]

Just the one circuit has these unusual voltages or does other circuits have unusual voltages also?

What does voltage do when loaded vs unloaded? Try a light load of only maybe 50 watts as well as a heavy load of 1000 - 1500 watts.

Does voltage at panel remain nearly constant when voltage at an outlet drops? Presuming you have less then 100 feet of circuit length, you shouldn't see more than 5-6 volts dropped if all circuit connections are in good shape, even with the 1000-1500 watt load connected.