A permit shall not be required for minor electrical repairs, maintenance or installation of six or less openings that are necessary and incident to the maintenance in good condition of an established plant, installation or system of wiring. This exception does not permit the installation of any new circuits or the extension of any circuits already installed. The holder of a wiring permit may install all wiring and fixtures on such permit; however, if any of the wiring or fixtures are installed by other than the party to whom the permit is issued, a permit must then be taken out by the party doing the work.
('69 Code, § 8-55)