Hmm I can't think of a really good way to explain it but I can give a example of it although it doesn't involve a breaker box. I used to have my entertainment center and wall unit AC plugged into the same outlet and when the ac would come on my tv picture would get scrambled, the local channels would get fuzzy and the digital channels would get pixelated. Don't know if that's the kind of example you're looking for but maybe it will help.