NEC Article 680 — Pools, Hot Tubs & Spas: Bonding, GFCI, and the Rules NJ Inspectors Check First

NEC Article 680 exists because water plus electricity is the highest-stakes combination in residential work. Every pool, hot tub, and spa install in NJ runs through it, and municipal inspectors check 680 items more carefully than almost anything else on a final.

Equipotential bonding (680.26) — the big one: everything conductive within reach of the pool gets bonded together with solid 8 AWG copper — the pool shell's rebar, metal ladders and rails, pump motor, metal fences within 5 ft, even the water itself (via a listed bonding fitting). This is NOT about tripping a breaker; it's about eliminating voltage gradients so a person touching two surfaces can't become the path. Missing perimeter bonding is the #1 reason pool finals fail in NJ.

GFCI everywhere (680.21–22): pool pump motor circuits require GFCI protection regardless of voltage. Receptacles between 6 ft and 20 ft of the pool wall must be GFCI-protected; NO receptacles within 6 ft (one GFCI-protected pump receptacle allowed at 6–10 ft where cord-connected). Underwater luminaires above the low-voltage contact limit are GFCI-protected too.

Distance rules that catch homeowners: overhead service conductors can't pass over the pool (22.5 ft clearance zones for utility lines); switches at least 5 ft from the water's edge unless separated by a barrier; luminaires within 5 ft horizontal of the water must be 12 ft above it (existing installs have narrower allowances with GFCI).

Hot tubs and spas (680.42–44): an outdoor spa follows most pool rules. The famous one is the maintenance disconnect: within sight and at least 5 ft from the tub (readily accessible, so the tech servicing it can see nobody re-energizes it). Packaged self-contained spas with a listed GFCI-protected assembly simplify things, but the disconnect and bonding still apply. Indoor spa receptacle: at least one 6–10 ft from the water, GFCI-protected.

Feeder reality: most NJ hot tubs are 50 A or 60 A 240 V circuits with a GFCI spa panel at the disconnect location; in-ground pool builds usually justify a small subpanel — which brings Article 225 outside-feeder rules into play for the pool house or equipment pad.

NJ permit reality: pools and spas need BOTH an electrical permit and (for in-ground pools) building/plumbing permits, with the bonding grid inspected before the deck pours. A hot tub "just plugged in" on an existing 120 V circuit is limited to listed cord-and-plug models — anything hardwired 240 V is permit work. Home inspectors flag unpermitted spa circuits on nearly every NJ resale where one exists.

Sizing note: a 50–60 A spa circuit is a significant load on a 100 A service — run the numbers in the Malfettone Load Calculator at /tools/load-calculator before committing, especially alongside an EV charger.