Electrical Requirements for New Service and Upgrades

If installed in the United States, the electrical wiring of all hot tubs must meet the requirements of section 422-20 of the National Electric Code (NEC) and any applicable state or local codes. The electrical circuit must be installed by a licensed electrician and approved by a local building/electrical inspection authority.
BEFORE DELIVERY OF YOUR HOT TUB and for all operating hot tubs

All 240V hot tubs must be permanently connected (hard wired) to the power supply. 120V hot tubs may use GFCI cord, plugged into a grounded outlet. Supplying power to the hot tub which is not in accordance with these instructions will void both the independent testing agency’s listing and the manufacturer’s warranty.

The power supplied to the hot tub must be a dedicated circuit with no other appliances or lights sharing the power.

When determining the current, voltage and wire size required for the hot tub configuration to be connected, refer to manufacturer’s recommendations and keep these points in mind:
  • Wire size must be appropriate per NEC and/or local codes.
  • We recommend THHN copper core wire.
  • All wiring must be copper to ensure adequate connections.
  • Do not use aluminum wire.
  • When using wire larger than #6, add a junction box near the hot tub and reduce to short lengths of #6 wire between the junction box and the hot tub.

The electrical supply for the hot tub must include a suitably rated switch or circuit breaker to open all ungrounded supply conductors to comply with Section 422-20 of the National Electric Code, ANSI/NFPA 70. The disconnecting means must be readily accessible to the hot tub’s occupant but installed at least 5 feet (1.5m) from the hot tub water.

The electrical circuit for the hot tub must include a suitable ground fault circuit interrupter (GFCI) as required by NEC Article 680-42.
The disconnect must be readily accessible and visible to the spa occupant but installed at least 5 feet, measured horizontally, from the spa water.