Hot tub wiring — the NEC Article 680 safety chain

A spa adds three Article 680 rules: a GFCI circuit, a disconnect 5+ ft from the water and in sight, and #8 solid copper bonding.

A plan view of a 240 V spa. A GFCI-protected maintenance disconnect sits at least 5 feet from the water and within sight, feeding the spa. A dashed equipotential bonding loop of #8 solid copper ties the metal parts together around the tub. A checklist notes the three Article 680 requirements: GFCI on all outlets (680.44), disconnect 5+ feet and in sight (680.13), and #8 solid copper bonding (680.26). — Source: NEC Article 680 (680.13, 680.26, 680.44); Table 300.5

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A plan view of a 240 V spa. A GFCI-protected maintenance disconnect sits at least 5 feet from the water and within sight, feeding the spa. A dashed equipotential bonding loop of #8 solid copper ties the metal parts together around the tub. A checklist notes the three Article 680 requirements: GFCI on all outlets (680.44), disconnect 5+ feet and in sight (680.13), and #8 solid copper bonding (680.26).

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