Hot Tub Wiring

Discussion in 'Electrical Forum discussion & Blog' started by aopainter, May 31, 2011.

  1. DonL

    DonL Jack of all trades

    Messages:
    3,810
    Location:
    Houston, TX
    It should be on a ground fault interrupt.


    DonL
    Last edited: Jun 1, 2011
  2. DonL

    DonL Jack of all trades

    Messages:
    3,810
    Location:
    Houston, TX
    Mixing conductor sizes and colors may be a problem, the ground wire can be smaller, but the other current conductors need to be the same size.

    I hope your project works well.

    Be careful playing with electricity...

    DonL
    Last edited: Jun 1, 2011
  3. Jim Port

    Jim Port Electrical Contractor

    Messages:
    156
    Location:
    Maryland
    I would not change to a smaller size neutral. Some tubs also call for a ground the same size as the other conductors.
  4. ActionDave

    ActionDave Electrician

    Messages:
    345
    Location:
    Colorado
    What size breaker are you tying the 6AWG to? I would guess either a fifty or forty amp breaker. That would mean you would need at least a 10AWG green.

    Jim Port correctly states that some manufactures, a lot actually, want a full size neutral and ground. Check your instructions.
  5. aopainter

    aopainter New Member

    Messages:
    10
    Location:
    Seattle
    It's a 60 amp Disconnect panel
  6. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
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    Location:
    North Carolina
    Don’t make this more than it has to be.

    Install #4 SE-R al. to the disconnect located on the outside wall and then flex and THW cu. conductors to the tub.
  7. DonL

    DonL Jack of all trades

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    3,810
    Location:
    Houston, TX
    I am glad you stopped by JW,

    I don't think that his friend needs to be thrown under the bus, he is trying to help out.

    And aopainter just wants help, not BS.


    Thank You...
  8. ActionDave

    ActionDave Electrician

    Messages:
    345
    Location:
    Colorado
    10AWG copper will work for an equipment ground up to sixty amp.
    This is another way to skin your cat and would most likely be more economical.
  9. aopainter

    aopainter New Member

    Messages:
    10
    Location:
    Seattle
    I can't find this cable anywhere online to know what it looks like. I'm going down to the electrical wire store today, so I'll ask about that wire. I was able to get about 90ft of PVC conduit for $17, so i'm going to put that in the attic
  10. DonL

    DonL Jack of all trades

    Messages:
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    Location:
    Houston, TX
    Save some conduit for exposed wire outside...

    What wire can you not find ?
    Last edited: Jun 3, 2011
  11. aopainter

    aopainter New Member

    Messages:
    10
    Location:
    Seattle
    I bought 20ft of EMT conduit for the outside. But the wire I cant find online is "#4 SE-R al." And thats 4AWG right? Do I need 4AWG, i thought 6AWG was what I wanted
  12. DonL

    DonL Jack of all trades

    Messages:
    3,810
    Location:
    Houston, TX
    If you are putting in a 60 amp service, then you may need #4.

    You might want to see what your current requirements are, and that will determine the breaker and wires size.

    The length does play into the equation, But code seems to play different, That depends on local codes.

    Maybe your friend could make sure that you can meet your code. He should know the requirements.
  13. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,529
    Location:
    North Carolina
    #4 American Wire Gauge aluminum Service Entrance four conductor cable is good for 50 amps. It does not need to be installed in a conduit. Lowe’s or Home Depot will cut to length or any electrical supply house.

    Electrical Metallic Tubing is a bad idea to use for the final connection to the hot tub as the chemicals used in the tub will cause it to rust. Non-Metallic Flex is a better idea for the final run of copper THW conductors.

    Take you age and multiply it by 10 and you haven’t come close to the number of these tubs I have installed in my life time so listen to experience.
  14. Jim Port

    Jim Port Electrical Contractor

    Messages:
    156
    Location:
    Maryland
    The SER cannot be used for the exterior portions to feed the hot tub. The grounding conductor needs to be insulated.

    There is a 6' limit on the flex to feed the tub.
    Last edited by a moderator: Jun 3, 2011
  15. DonL

    DonL Jack of all trades

    Messages:
    3,810
    Location:
    Houston, TX
    JW is correct, old farts know some stuff.....
    Just meet your local code... And get it done...
    Last edited by a moderator: Jun 3, 2011
  16. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,529
    Location:
    North Carolina
    6 feet from the outside of the tub in the 2011 edition
  17. ShockHazard

    ShockHazard New Member

    Messages:
    50
    Location:
    North East Pennsylvania
    Is it legal to have a 3 conductor feed going outside?
    I was under the impression all outdoor 220 fixtures were 4 conductor only.
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