A while back I came home and some lighting circuits were dim. I checked the voltage at the main box before the main breaker and one power leg to neutral was about 150 volts but the other power leg to neutral was about 90 volts. The local utility sent a lineman out and after finding no bad connections, he concluded (rightly) that the neutral wire from the pole was cut. My question is: why didn't both read the same since the neutral was connected to the house ground? Thanks.