Underground wiring shall not be installed under or within the area extending 5 feet horizontally from the inside walls of pools and outdoor hot tubs and spas, with the exception of:
Where the wiring is installed to supply pool, spa or hot tub equipment or where space limitations prevent wiring from being routed 5 feet or more horizontally from the inside walls. Where installed within 5 feet of the inside walls, the wiring method shall be rigid metal conduit, intermediate metal conduit or a nonmetallic raceway system. Metal conduit shall be corrosion resistant and suitable for the location. The minimal cover depth shall be 6 inches for rigid and intermediate metal conduits and 18 inches for nonmetallic conduits.