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Electrical Wire and Cable

Electrical Codes for Hot Tubs

Summary: Listing of electrical codes for hot tubs with examples of hot tub codes for home electrical wiring.

Electrical Code Definitions for Hot Tubs

Hot Tub Codes in NEC, National Electrical Code Section 680

This listing provides an example of the typical electrical codes for hot tubs as found in the articles of section 640 of the National Electrical Code.

Highlights of the Codes for Hot Tubs include GFCI Protection for the electrical circuit and electrical equipment within the vicinity of the hot tub.

Code Adoption Information: The codes shown are examples only and may not be current or accurate for your application or jurisdiction. Contact your local building authority for complete information.
  • NEC 680.22(A)(4)
    • Pools, spas whirlpool tubs and boathouses.
    • GFCI Receptacle outlets.
    • Receptacles that are within 20 feet or less of pools and outdoor hot tubs must be GFCI protected.

  • NEC 680.42(A)(1)
    • Hot tub/spa.
    • LFMC or LFNMC is permitted up to 6 feet for a package unit hot tub or spa.

  • NEC 680.42(A)(2)
    • Hot tub/spa.
    • A cord up to 15 feet is permitted for a GFCI-protected package unit hot tub or spa.

  • NEC 680.42(B)
    • Hot tub/spa.
    • Bands used to secure hot tub staves are exempt from bonding.

  • NEC 680.43(A)(3)
    • Pools, spas whirlpool tubs and boathouses.
    • GFCI.
    • GFCI protection is required for receptacles that provide power to indoor spas or hot tubs

  • NEC 680.44
    • Pools, spas whirlpool tubs and boathouses.
    • GFCI.
    • GFCI protection is required for outlets supplying power to any self-contained packaged spa, hot tub or field-assembled units with heating that is less than 50 Amps.

Questions about Wiring Hot Tubs


  • Is it up to the Electrical Code and Safe to Splice Hot Tub Wires?
    • I’m replacing my old hot tub with a newer hot tub. I have a GFCI breaker in my main panel going to direct burial wire under ground to a quick disconnect box then out of there to my hot tub. When I got my new tub the wires ended up being to short so I spliced them with a heat shrink splicing kit inside the hot tub cabinet then to the control panel I used 6 gauge wire for all the connections. Is it up to code and safe to leave the splice where it is?

This electrical wiring question came from Randy, a Handyman in Trinidad , Colorado.


  • Electrical wires may be spliced inside a hot tub cabinet as long as the wires and connections are contained inside an approved electrical box. The electrical box must be securely mounted and accessible and have a cover plate. The additional length of wires or cable must match the same size and type of the original circuit.

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