gobblerhuntr
Member
110108-1651 EST
If the voltages are good at the meter of the house in question under the load test, then the neighbor has nothing to do with the problem.
On the other hand if the neighbor is willing to let someone into their home, then that neighbor can be useful. If the problem is inside the transformer, at its terminal, or in a neutral connection common to both houses, then a load change producing a large unbalanced voltage at home A resulting from a problem closer to the transformer than the common neutral connection point for the two houses will also produce a large voltage change at house B.
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Correct, then once determined if the problem is in the house or on the exterior you make your next move from there. If inside, you have to start running your circuits for problems. You might consider checking amps on each leg to make sure it is not drastically overloaded, which I doubt unless you have added something significant. If on the outside I would calmly go and talk to the POCO and tell them what you have done and ask if they could come out and check once again, also mention that you neighbor is off the same pot and you wish they could disconnect him long enough to check and see if he was effecting (sp) you.
One other thing I have seen in the past would be a bad leg on the underground service. One that has not completely failed but will soon. this could cause the normal voltage with no load and weird when load was applied. With the voltage readings I would think it was in the neutral somewhere.