§ 4-331 APPROVED MATERIALS.
   No electric materials for wiring of appliances or equipment shall be installed in the city unless they are in conformity with the provisions of this article and with the approved standards of construction for safety to life and property. Conformity of materials for wiring appliances and equipment to the standards of the Underwriters Laboratories, Inc. shall be prima facie evidence that the materials, devices, appliances and equipment comply with the requirements of this article.