I have disconected to center tap and grounded the case, and now I get about six inches of arc with the welder cranked all the way up, but the breaker still blows at that point. I noticed in one of your emails that you specified a AC welder. I am using a AC/DC stick welder. Is that a possible problem? The only other thing I can think of is possibly the setting inside of the pig is wrong. There are five settings, I have it on the lowest now. Any help would be great. Thanks Mario