What do you call the work that needed to be done in order to remove the existing electrical cables in my house and replace them with a wiring layout that was able to add a second outlet in my bedroom? (Or, far better - the unofficial extra wires that the contractor found which had been loosely spliced into the existing system by the previous owner in order to power the new bathroom lights he added, which just stopped working when we removed the old cable because nobody knew that connection existed).