Posted by George Marsh on January 11, 2014 at 10:10:13 from (50.121.7.90):
I got a call at 6 am yesterday form a tenant. No heat, no hot water. Both are on 220v. As I suspected, one leg wasn't working. I was lucky, got a union electrician there by noon. I told the electrician I had an old QO load center and described the main breaker. Well homeline has twice redesigned the main. The electrician had seen this before, so he bought out a 100 amp 220v breaker, some extra wire, special connections to splice with and got power up in no time.
While I was waiting for him, I moved a few wires around to get lights and refrig working. With the right leg down, I turned off all the breakers it powered up. Even turned off all 220v breakers to eliminate back feeding.
Just when you think you know all there is to know about electricity, electricity will prove you wrong. The top 110v 20 amp breaker on the right is connected to the bad leg. I turned the breaker off more than once, because my amprobe showed 0.8 amps going throught the wire. Only way I could stop the current flow was to pull the breaker from the panel.
Another 220v breaker, on the bad leg on the bad leg only, was showing 1.2 amp when the breaker was turned off. That breaker went to the range.
The bad leg, 0 volts, all breakers turned off was showing 2.4 amps.
The union electrician just blew it off, Said the problem was the digital amprobe.
24 hours later, all it fine. When tenant moves out, I'll take a second look at load center.
If anyone has a good 100 amp main to a QO load center, I'll leave my email open and be glad to buy it off you. I was told that breaker hasn't been made for about 15 years.
So, Let the buzzing begin about your theory why current was flowing with breaker off. No current when breaker was removed from load center.
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