a plumber friend went on a job for a leak in a wall. when he cut out the sheetrock he found a nail in a heating pipe. the home owner told him a friend installed a bigger window for him. he also found a romex splice in the wall no box no wire nuts just tape. the plumber told him you better call an electrician. with the money he spent on the plumber and electrician he didnt save anything he should have called a pro. in the first place.