"Sunday bloody Sunday" an AC Power system story

[exeric2]

Bob,

I ran into a problem that is similar. If you live in the USA then residential homes have their AC panels fed with two phase 120v lines. My house suddenly had the lights brighten dramatically and erratically. What happened was that the neutral ground line that was common to both AC phases lost its ground at the panel. So instead of having two 120v circuits all the circuits became one 240v line feeding all the individual circuit breakers. It blew out my computer I later found out.

 

I don't know if your electrical problems occurred over several circuits controlled by more than one CB, but if it does and the problems occur simultaneous then this is something to definitely look for.