Most hot tubs need a
dedicated 240V circuit, often
40 to 60 amps, with
GFCI protection and a
disconnect within sight of the tub, at least 5 feet from the water. Plug-in 120V spas are the exception. Your spa’s manual lists the exact amperage. Want help? See our
hot tub and spa wiring service.
The Checklist
- A dedicated circuit sized to the spa’s nameplate
- GFCI protection
- A disconnect within sight of the spa, at least 5 feet from the water
- Wiring buried at the right depth or run in conduit
- Bonding of metal parts where required
- A permit and inspection
Plug-in vs. Hardwired Spas
Small plug-and-play spas run on a standard 120V GFCI outlet but heat slowly. Most full-size hot tubs are hardwired on 240V.
Want a licensed electrician to take a look? Ready Electric answers 24/7.
Can Your Panel Handle It?
A 50 amp spa circuit is a big load. On a 100 amp service with AC or an EV charger, it may not fit without a sub-panel or upgrade. A load calculation tells you.
Plan It Before Delivery
Decide the spa location with the electrical run in mind. The closer to the panel, the lower the cost.
