680.24(A)(2) Installation. Where the luminaire operates over 15 volts, the junction box location shall comply with (A)(2)(a) and (A)(2)(b). Where the luminaire operates at 15 volts or less, the junction box location shall be permitted to comply with (A)(2)(c).
(a) Vertical Spacing. The junction box shall be located not less than 100 mm (4 in.), measured from the inside of the bottom of the box, above the ground level, or pool deck, or not less than 200 mm (8 in.) above the maximum pool water level, whichever provides the greater elevation.
(b) Horizontal Spacing. The junction box shall be located not less than 1.2 m (4 ft) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier.
(c) Flush Deck Box. If used on a lighting system operating at 15 volts or less, a flush deck box shall be permitted if both of the following apply:
(1) An approved potting compound is used to fill the box to prevent the entrance of moisture.
(2)The flush deck box is located not less than 1.2 m (4 ft) from the inside wall of the pool.
