Here is one for the pros.We have a fairly old house, some circuits still with knob&tube and some of these using neutrals for switching lights which we find common in the older houses, a new service installed not to long ago,and some new branch circuits run during service change. Now here is the problem.Every time a motor starts in the house, dishwasher,disposal etc etc,half the lights in the house go dim and half get brighter for a few minutes.I know some will immedietly start blaming the neutral but I think its more involved in that. Thank you and please give me a few days to respond.