Electrical installations for spas, hot tubs, and hydromassage tubs must comply with Part I of NEC Art. 680. The requirements that apply specifically to spas and hot tubs are in Part IV. Those that apply specifically to hydromassage tubs are in Part VII.
Spas, Hot Tubs, and Hydromassage Tubs
Reduce pool and tub shock hazards by eliminating the potential between users and equipment.