All operating and conducting mains, conduits and wires of any person to whom a permit is granted pursuant to this chapter, which mains, conduits and wires are laid below the surface of the ground, shall be thoroughly and securely insulated with a material of sufficient thickness and durability to be not easily abraded or injured mechanically, and impervious to water, where deemed necessary by the Superintendent of Public Works. All conduits shall be laid in streets and avenues in a line parallel with the curbline thereof at such distance from the curbstone or where the curbstone should be, as designated by the Superintendent. It is especially required that all service connections used by such person shall be connected only with the nearest main source of supply laid in an alley or in a street nearest to the building into which it is desired to conduct such service.
(1979 Code Sec. 13.28.080)