UL 676

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These requirements cover electric lighting fixtures for installation below the surface of the water in swimming pools, permanently installed spas, hot tubs, and similar water-containing vessels intended to accommodate the complete or partial immersion of persons, and for operation on supply circuits rated 150 volts or less, in accordance with the National Electrical Code, NFPA 70.

These requirements also cover:

1. 1.Metal fixture housings (forming shells) for use with wet-niche fixtures intended for installation as described in ;
2. Mounting brackets for use with no-niche fixtures intended for installation as described in ; and
3. Electric lighting fixtures and junction boxes for installation in fountains and similar water-containing vessels not intended to accommodate the complete or partial immersion of persons.

These requirements do not cover junction boxes for use in swimming pools and spas, ground fault circuit interrupters, transformer enclosures, or transformers used for the supply of underwater fixtures.