The bonding requirements for outdoor spas and hot tubs has been revised, once again, and wiring method requirements have been expanded. Article 680 Swimming Pools, Fountains, and Similar Installations Part IV. Spas and Hot Tubs 680.42 Outdoor Installations. Electrical installations for outdoor spas or hot tubs must comply with Parts I and II of this Article, except as permitted in (A) or (B). (B) Bonding. Bonding is permitted by mounting equipment to a metal frame or base. Metal bands ...

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