The provisions of this section apply to lighting fixtures installed below the pool surface.
(A) No lighting fixture shall be installed for operation at more than 12 volts.
(B) A nonmetallic fixture shall not be used with a grounded power supply.
(C) All noncurrent carrying metal parts of lighting fixtures shall be grounded, whether exposed, or enclosed in nonconducting materials.
(D) Fixtures approved for the purpose may be installed outside the walls of the pool in closed recesses which are adequately drained and accessible for maintenance.
(E) Approved metal fixture housings (forming shells) shall be installed for the mounting of all underwater fixtures and shall be equipped with provisions for conduit entries. Metal parts of the fixture, fixture housing, and the supply conduit below grade level shall be of brass or other suitable copper alloy. The conduit shall extend from the fixture housing (forming shell) to a suitable junction box located as provided in § 154.34.
(F) Transformers used for the supply of fixtures, together with the transformer enclosure, shall be approved for the purpose. The transformers shall be of an isolating type having a grounded metal barrier between the primary and secondary voltage windings.
('69 Code, § 6-133)