Swimming Pool Equipment, Spas, Fountains and Hydromassage Bathtubs Marking and Application Guide
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Field Installation. Swimming pool and spa luminaire junction boxes are provided with the
means of independent termination for the equipment grounding conductors inside the box.
Each termination for an equipment grounding conductor will accommodate one conductor
in the range of No. 16 to No. 12 AWG. A junction box marked ―Suitable for Use With a
Low-Voltage Luminaire‖ has equipment grounding conductor terminations suitable for the
range of No. 16 to No. 10 AWG. Junction boxes are also provided with means to terminate
No. 8 AWG supplementary equipment grounding conductors for use where the wet-niche
or no-niche luminaire is installed using non-metallic conduit. A junction box and cover
combination with a volume of 100 cubic inches or less is marked with its volume in cubic
inches. Installation instructions indicate the flexible cord type and conductor size or the
range of cord diameter to be used with an installed strain relief device. If the strain relief
means is to be field-installed, complete installation instructions are provided.
1.4. LUMINAIRES (See App. A–Figs. 1, 2, 4, 5)
Listing Mark. Underwater swimming pool luminaires come in six basic types as described
below. Luminaires suitable for swimming pool and spa equipment are identified by a Listing
Mark with one of these luminaire type designations, along with text to indicate they are
suitable for swimming pools. The Listing Marks of these products include one of the
following product names as appropriate:
―Dry-Niche Underwater Luminaire For Swimming Pool,‖
―Mounting Bracket For No-Niche Luminaire,‖
―No-Niche Underwater Luminaire For Swimming Pool,‖
―Housing For Wet-Niche Luminaire,‖
―Wet-Niche Underwater Luminaire For Swimming Pool,‖
―Underwater Luminaire for Aboveground Non-Storable Swimming Pools,‖ ―Convertible
Underwater Luminaire for Aboveground Swimming Pools,‖ or
―Fiber-Optic Underwater Luminaire for Swimming Pools.‖
Luminaires intended for fountains or other vessels not intended to accommodate the
complete or partial immersion of persons have a different identification. These luminaires
are identified as ―Submersible Luminaires.‖ A typical Listing Mark would be ―Dry-Niche
Submersible Luminaire‖. Luminaires with only this type of Listing Mark or product name
have not been evaluated for swimming pool or spa installations. Some luminaires have been
evaluated for use as both a swimming pool or spa luminaire and a submersible luminaire.
Luminaires suitable for both uses bear Listing Marks identifying both uses.
Field Installation:
Dry-Niche Luminaires. These luminaires are intended for permanent installation only in the
wall of a swimming pool or a field-fabricated spa, unless accompanying installation
instructions describe the option of installation in the bottom of the pool or spa. These
luminaires are intended to be installed with the top of the lens not less than 18 inches below
the normal water level, unless otherwise marked. They are designed for servicing from the
rear through a passageway behind the pool or spa wall, or, if mounted in the bottom of the
pool or spa, in a tunnel underneath the pool or spa. When the luminaire is properly installed
in a housing or ―niche,‖ no water should enter the niche.
Wet-Niche Luminaires. These luminaires are intended for permanent installation only in the
wall of a swimming pool or field-fabricated spa, unless accompanying installation
instructions describe the additional option of installation in the bottom of the pool or spa.
