All electric wiring installed shall be installed and used in conjunction with private residential swimming pools in conformity with National Electric Code standards, and the materials used or installed shall be as approved by National Underwriters' Laboratories.
No electric wires or conductors shall be installed or permitted to remain in such a position as to cross, either overhead or underground, any part of a private residential swimming pool, nor shall any electric wiring be installed parallel to any pool wall closer than five feet thereto, except if such wiring is both located underground and enclosed in rigid conduits.
All underwater lights shall be watertight, self-contained units, each with their own ground connection running from a waterproof junction box to a proper grounding facility or medium. All underground electric wires supplying current to such light or lights, within a distance of five feet of the pool wall or walls, must be enclosed in rigid conduits.
All metal fences, enclosures or railings which are located near or adjacent to private residential swimming pools and which might become electrically alive as a result of contact with broken overhead conductors or from any other cause shall be effectively grounded.