(A) The provisions of this code shall not apply to installations used by or made for electricity supply or communication agencies in the generation, transmission or distribution of electricity or for the operation of signals of the transmission of intelligence and located within or on buildings or premises used exclusively by such agency or on public thoroughfares or to installations by communication agencies and their employees or to those engaged in making installations for communication agencies in connection with the operation of said agencies and the rendition of communication and signal service to the public. All such installations when done according to the provisions of the National Electrical Safety Code will be prima facie evidence that such installations conform to the provisions of this code, provided however, that such agencies excepted are operating under a valid franchise agreement with the city.
(B) Any franchised electric utility company may adopt reasonable rules and regulations for the conduct of its business; provided, such rules and regulations shall be applicable to all customers alike; and further provided that where any provisions of such rules and regulations are in conflict with the provisions of this code, this code will prevail.
(`87 Code, § 30-5)