I have been asked to do a service changeout (from a fusebox to a breakerbox including a new service riser) on a house. The house is obvioudly pretty old. The wiring in the house is in questionable condition. There are wires hanging out of boxes, receptacles and switches hanging, an extension cord ran along the wall and ceiling for light power. My question is: if I do the service changeout and nothing else, is my liability limited to the work I specifically performed, or to the rest of the house wiring? The guy wants to repair the wiring himself.