Had a call today....... the more light's you turned on the brighter they all got and when the coffee pot turns on, whoa, get your shades. My voltage at the weather head/ meter socket and main breaker was 117 on A and 126 on B. Under heavy load it went from 117 down to 100 on A, and 126 up to 141 on B. All the grounded conductors were tightened down and examined at the panel. I disconnected the grounding electrode and hit it with the metal brushes and checked it for current and voltage and found nothing. I looked for a loose neutral in a plug or switch box and found all was well. I did a fop test on all the breakers, despite being fpe they were fine......Then she tells me it all started a two years ago when POCO installed the triplex AND a plumber removed a section of underground steel water pipe that went to the detached garage. Anyway after three hours I called POCO to come check the splice on the pole. I had to get to another job so I buttoned up, originally the call was an estimate to replace the panel and after asking her why she wanted to I suggested her problem was in the house not at the panel. I am still going to do the panel change but I am stumped for now on the goofy voltage.
What am I missing?
When ls lunch?