I am wondering it there is any way I could monitor and record the voltage myself, that doesn't cost an arm and a leg. I would like to get this resolved before I begin running expensive trains again.
Fluke makes a meter that will record voltage, phase fluctuations ect. I'll check the numbers on the one at work. You can google fluke meters and I am sure it will show
up.
I've scene main breakers act like what you are describing. The guy's are right.
Check for loose connections and slight burn marks first. Also check the service entry
cable. ( wire from the meter going into the house ) I've scene the insulation break
and moisture get into the cable.
Most of all BE CAREFUL !!!!