In changing an electrical wall switch
, I accidently tripped the breaker. Going to the main breaker box, I find that almost 40 breakers are unmarked. None seem to have been tripped, and I have even turned off some of the more likely breakers (all the way off, of course) and then back on (It's an upstairs bathroom with probably a smaller breaker-15 amp). Confused, I took a multimeter and checked every breaker (grounding the black wire on the breaker case, and touching the usually red wires coming out of the breakers)--ALL SHOWED 120 VOLTS!! Not sure what to do next...
JA: How old is the system in question? And have you consulted an electrician yet?
Customer: The system was totally rebuilt (replaced/modernized) around 1990. I have not consulted an electrician yet.
JA: Do you plan on doing the work yourself?
Customer: If I can figure this out.....
JA: Anything else we should know to help you best?
Customer: Don't know...happy to answer any question.