Bang! Main Breaker Tripped.

Vic Smith · 2012-05-29T03:49:06+00:00

Last night I was in the basement on the PC, and watching TV.Wife was asleep upstairs. Not sure if the central A/C was running,but most the lights in the house were off.I had a new service put in the year after I moved in, to get 240so I could put in a new furnace and central air.200 amp service, I was told.The main breaker at the top of the box has a "pair" of breakerswitches that move as one. Each says "100" on it.The furnace/A/C breaker is also a pair, each having "30" on it.The rest of the breakers are 15 or 20.Anyway, there was a loud bang, and all power in the house went off.Didn't see a flash or anything, but the breaker box was out of my lineof sight.I thought at first it was a transformer that blew up, which hashappened before, but the weather was clear.But that didn't seem right because it was too loud in the basement,which doesn't let hardly any sound in from outside.It woke up my wife too.I grabbed a flashlight and went upstairs, and saw right away myneighbors had power.Thought I was screwed, and would have to get the power company and/oran electrician in.Went back downstairs and found the main breaker had tripped.Flipped it back on and the lights went on.Another breaker was tripped - either a 15 or 20 - that runs somebasement lights and the pedestal pump for the lift system.Flipped that back on too.It's been about 24 hours, and everything's been normal. A/C running,pump running, lights working.That bang was pretty loud, about like a 1 1/2" firecracker, but not assharp sounding. Sounded "electrical" of course, but that's easy tosay when the lights go out at the same time.Wish I had a recording.Any idea what the hell happened?