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I just got done troubleshooting a circuit that suddenly lost power. It turned out that the bus bar at the particular slot was not feeding power to the breaker. I tried several new breakers in the same slot and none of them would draw power. When I moved the breaker to another empty slot, I get power again. Is this most likely a corrosion problem? I'm just wondering if anyones seen this before and what the recommended fix is.
 

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It has to be either SEVERE corrosion, or the stab area of the bus has actually melted off. But if that were the case, I seriously doubt the breaker could have avoided damage. Did you look?
 

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Whatever the issue is, it should be highly visible. I have the same question... did you look?
 

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Since no one else has asked, did you look at the buss bar?

I had an employee a few years back who thought that just because there were knockouts in the panel, there were spaces available.

Calls me one day saying a 2 pole breaker was only getting power on one leg. I go check it out and he had installed the breaker at the bottom part of the panel. Problem was the buss bar ended one space up.

He never looked.
 

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I responded to a call for "no power". The wire was landed and breaker in the on position. I took a reading on the breaker/wire terminal and read nothing, then voltage, then nothing again. A closer look revealed the screw that attaches the horizontal "finger" to the vertical buss was missing. Not loose, but missing. There is always a reason why. Now is your chance to find it.
 

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