Parking garages typically do not have permanent electric power outlets but do have other types of permanent electrical fixtures and fittings. An electric power outlet is mechanically and electrically connected to a removable connector half of an industrial electric fixture fitting to provide a convenient and inexpensive source of electric power for maintenance and work crews to operate power equipment. An electrical fixture is removed from its fitting and an electrical adaptor having an electric power outlet mechanically and electrically connected to a removable connector half of the electrical fixture fitting is mated to the fitting to temporarily convert the electrical fixture fitting to an electric power outlet.