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Thread: Hot Tub Wiring

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  1. #1
    DIY Junior Member aopainter's Avatar
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    Default Hot Tub Wiring

    I am running the wire for my hot-tub, and I had a few questions.

    1.) My electrician told me I needed Type SO 6/3 wire, and I don't understand what the Type SO means, and is it really needed? I am running it through my attic, and its going about 70ft.

    2.) He gave me two options of either the Type SO cable, or get 4 THHW wires, and run them through the conduit. Is PVC conduit acceptable to run this through? and instead of getting 100ft of each color (rd,bk,wht, grn/ylw), can i just get 400ft of one, and mark the color myself? it seems to be cheaper to do that.

    Anyways, I'm getting very tight financially, and just trying to figure out which way would be the most economical, but still safe way to install the wiring.

    Thanks for your help

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    You only need three colors, and if the hot tub doesn't need 120vac, you can use two black for the hots and a green for the ground. So, you may only need two hots and a ground. If the tub needs 120vac as well as the 240vac, then you'll need a white for the neutral.

    Don't know if the inspector will buy off on them all being the same color (I doubt it)...too many chances for error or confusion down the road. They sell pvc tubing rated for electrical wiring (stuff I've seen is grey, but they probably make it in others). You'd have to research what size you need for the 6g wires. It has a bell on one end to mate up with the straight end of the next piece. Trying to get 6g wires through conduit can be a pain, especially if it has elbows.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Test, Don't Guess! cacher_chick's Avatar
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    It would help to know if the hot tub was being installed indoors or out.

  4. #4
    DIY Junior Member aopainter's Avatar
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    It being installed outdoors. Its running from my box, through the attic, to the disconnect panel on the outside wall in back of my house.

  5. #5
    DIY Junior Member aopainter's Avatar
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    also, do I need the type SO for my attic?

  6. #6
    Electrical Contractor Jim Port's Avatar
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    The best advice I can give you is to get a new electrician. The one you have now has no clue.

    Type SO is a flexible cord. It cannot be used in place of proper methods like conduit and THWN conductors.

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