How to Wire a Hot Tub Spa

Hot tubs need 220 volts, just like your laundry dryer.
Unfortunately, you can’t skimp on the electrical wiring job for a hot tub spa. It isn’t a simple matter of plugging the spa into the household power as it gets delivered off the truck. Regulations require spas to have their own power circuit, and you need to use 220 volt ground fault circuit interrupters--similar to the power outlets you have in the kitchen and bathroom. Final connections need to be made by an electrician, but you can do a lot of the layout work.

Step 1

Install a 50 amp GFCI breaker at least 5 feet away from the spa. You will be providing a 60Hz, single phase, three-wire electrical service with a ground to the spa.

Step 2

Connect the black wire from the GFCI breaker's terminal L1 to Line 1 of the hot tub spa power pack.

Step 3

Connect the white wire from the GFCI breaker’s terminal N to neutral on the hot tub spa power pack.

Step 4

Connect the ground wire from the GFCI breaker’s terminal GND to Ground on the hot tub spa power pack.

Step 5

Connect the red wire, from the GFCI breaker’s terminal L2 to Line 2 of the hot tub spa power pack.

Things You Will Need

  • Copper wire - 8 gauge under 50-feet and 6 gauge if over 50-feet
  • 50 amp GFCI breaker

Tip

  • Ground any ladders and metal equipment, such as rails.

About the Author

Patrick Nelson has been a professional writer since 1992. He was editor and publisher of the music industry trade publication "Producer Report" and has written for a number of technology blogs. Nelson studied design at Hornsey Art School.