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I'm getting readings of 120v and 81v alternating On one side of panel (call it A) and 120 and about 6.8 alternating on the other side (call it B) (all 2 pole 20 amp breakers to service 240 ). Obviously nothing working powered from this side. Some lights and low draw items work (intermittently) from 81v circuits on the other side. (A)

Have tried cycling the 200 main a few times and I would get "full power" for a few hours then eventually revert back. Ideas on why? Hoping just a 200 amp main breaker replacement...I don't think the q

John Steger
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Most likely you have a loose hot either in your panel, the meter base or the PoCo's transformer connections. Powering down will allow the wire connection to cool, then when power is restored it starts failing again. We had the exact same problem a the parsonage next to my church, turned out to be bad connection in the meter base. Half the house would loose power and none of the 240v appliances would work.

George Anderson
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Thabus bar in panelnk you for your help folks, I remembered this post and thought I'd use the format to help with diagnosis. With the information provided by systematically checking the entire panel. (And the buzing noise i heard in the process) led me to the main breaker. By removing it, the evidence was pretty clear..

the sketch of my process

John Steger
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