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Does My Sauna Require A Dedicated Electrical Circuit?

The sauna will require a dedicated 240 volt 40 amp GFCI Protected Circuit installed according to…

Electrical Question from Mike about Wiring a New Sauna
Background: Mike, a Homeowner from Ontario Canada

Question: I am installing a sauna in my basement. I was hoping to use a power cable that ran to an old water heater – 30 amp breaker 2 wire 10 gauge. However the sauna heater is rated at 7.5kW and the voltage is 240 V. The heater unit is marked 31.2 amp. Can I use the existing cable or do I have to run #8 with a 40 amp breaker. The current cable runs behind a wall and would be a pain to replace.

Dave’s Reply:
Thanks for your electrical question Mike. The sauna will require a dedicated 240 volt 40 amp GFCI Protected Circuit installed according to applicable electrical codes. Take your time, but do it right. What a great opportunity to do something different! Besides, just think how great it’s going to feel soaking away and knowing you did it right!

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FAQs Frequently Asked Questions and Comments

2 Responses to “Does My Sauna Require A Dedicated Electrical Circuit?”
  1. Mike says:

    We purchased a sauna that requires a socket with a T(110v 20amp). They recommend a dedicated line. Our house was built in 05 and the breakers all read 20amp. Can I just exchange the required outlet and plug in my new sauna?

    • Dave Rongey says:

      Hi Mike,
      Just replacing the outlet and plug does not create the recommended dedicated circuit, I know that’s a bummer – don’t we all wish it was that easy? It would be best to install the dedicated 120 volt 20 amp circuit as the manufacturer suggests, especially if this older home that has original wiring where it would not be a good idea to add such an additional load onto old existing circuit wiring.


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