In CT, like in MA (and everywhere else, I'm sure) it is illegal to do electrical work unless you are a licensed electrician. In CT we have a Department of Consumer Protection to watch over this. I would either write a letter to the DCP to explain/complain what happened, naming names, dates, places etc. or I would have a heart-to-heart with the GC, explaining the facts of life about responsibilities and legalities, or both (depending on his response). You gotta cover your butt, but, fisticuffs or shouting matches never solve anything in a civilized society. The letter to the DCP dated prior to any disaster would give the courts a reason to assign blame away from you.