680.42 Outdoor Installations
Equipotential bonding of perimeter surfaces in accordance with 680.26(B)(2) shall not be required to be provided for spas and hot tubs where all of the following conditions apply:
- The spa or hot tub shall be listed, labeled, and identified as a self-contained spa for aboveground use.
- The spa or hot tub shall not be identified as suitable only for indoor use.
- The installation shall be in accordance with the manufacturer's instructions and shall be located on or above grade.
- The top rim of the spa or hot tub shall be at least 710 mm (28 in.) above all perimeter surfaces that are within 760 mm (30 in.), measured horizontally from the spa or hot tub. The height of nonconductive external steps for entry to or exit from the self-contained spa shall not be used to reduce or increase this rim height measurement.
Informational Note: For information regarding listing requirements for self-contained spas and hot tubs, see ANSI/UL 1563-2010, Standard for Electric Spas, Equipment Assemblies, and Associated Equipment.