If you open the disconnect, the voltages could "correct" themselves simply by having the load removed, and the POCO guy will probably say the problem is on your side. Don't believe him. Have him check the voltages at the transformers, not on the ground somewhere. I absolutely hate it when one of our guys tell the consumer that the problem is on their side because the voltages straightened out by pulling the meter or the disconnect. All that will prove is that the disconnect is working... And in order to correctly check the transformers, they need to be "unbanked" and checked individually. I have seen (and changed :ashamed1: ) the wrong XF out because I was "sure" and trying to finish in a hurry.