Well as I said before HO said breaker were arcing. Well this home was built 30 plus years. Nice home all brick home mulit-levels. The Panel is QO ITE breakers. The bus bar looks good, no moisture. One thing I found was panel is for 42 circuits and there were 51. Minis were at the bottom of panel. One breaker had two wires in it and these breakers are not made to have two wires. All the tell-tell signs of arcing were around this breaker both sides of buss. The breakers above and below and across showed arcing signs. Now I pull this beaker with two wires and they fell right out, not tight at all. On examining the buss behind these breakers, the buss looked good. All the other breakers, minis included looked good. No pitting from arcing anyplace. The breakers in question just show film or residue from arcing. This is a big panel 400 amp main. I was thinking maybe putting in a small sub-panel next to it to handle some of the load. Any suggestions or thoughts.