Hot tub, spa, and pool equipment wiring in Denver
Water and electricity get their own article in the code, and a backyard spa is where its bonding and disconnect rules show up.
A typical portable spa runs on a dedicated 240 volt circuit with ground-fault protection, feeding an exterior disconnect the bather can reach. That disconnect has to sit at least five feet from the inside wall of the tub and stay visible from it, so nobody in the water is reaching toward the power source, and a breaker inside the house does not satisfy it. From the disconnect, a short run of flexible conduit lands at the spa pack.
Bonding is the part that gets skipped and the part that matters most. Metal within five feet of the water, including the pump motor, a metal railing, and reinforcing steel in a surrounding slab, gets tied together with solid number eight copper so everything nearby sits at the same potential and no current wants to flow through a person. Pool equipment follows the same logic with more pieces, and every pump, heater, light, and receptacle inside the zone around the water carries its own placement and protection rules.
what size breaker does a hot tub need?
Most 240 volt portable spas call for a dedicated 50 amp ground-fault protected circuit, but the nameplate on the unit is the authority. Tubs with multiple pumps or a larger heater can need more, and some 120 volt plug-in models run on a smaller dedicated circuit.
how far does a hot tub disconnect have to be from the tub?
At least five feet from the inside wall of the tub, within sight of it, and reachable by someone at the spa. The intent is that a person can shut the unit down in an emergency without approaching the equipment or going back inside the house.
can a hot tub be plugged into a regular outlet?
Only the models built for it. Plug-in spas are designed for a 120 volt supply and carry ground-fault protection in the cord, and they still want a dedicated circuit rather than sharing one with the rest of the patio. Anything running at 240 volts is hard-wired.
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