Conduit recommendation for spa

Discussion in 'Electrical Forum discussion & Blog' started by MJ32V, Feb 18, 2008.

  1. MJ32V

    MJ32V New Member

    Messages:
    9
    Location:
    NY
    Hello all. For rigid non-metalic conduit, what is the conduit size recommendation to run the following 7 conductors in the same conduit?
    - 6 AWG: 3 conductors, 8 AWG: 1 conductor, 12 AWG: 3 conductors.
    All conductors are THWN. Approximately 90' to 100' run total. Larger conductors to provide power to spa (220v/50A). 12 AWG conductors to provide power to shed (misc power tools w/ low duty cycle pwr requirments).
    Also... what is the min. burial depth and any other requirements for burial in lawn? (ie; buried in stone dust, etc?)
    Thanks,
    MJ
  2. brownizs

    brownizs In the Trades

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    Location:
    Springfield, IL
  3. Alectrician

    Alectrician DIY Senior Member

    Messages:
    689

    They don't actually spell it out....or maybe I missed it. Didn't there used to be a table where you could cross the wire size with the pipe size?

    All I could find were the values for the areas of the pipe and wire. I remember laughing at the 10, #12's in a 1/2" emt column.



    You will have plenty of room in 1" unless you do some crazy back to back 90's



    18" of cover
    Last edited: Feb 18, 2008
  4. brownizs

    brownizs In the Trades

    Messages:
    196
    Location:
    Springfield, IL
  5. Alectrician

    Alectrician DIY Senior Member

    Messages:
    689
    The conduit fill calculator was pretty slick. It took 20 seconds :)

    It took me more than 20 seconds to find my high powered reading glasses and find "conduit fill" in the NEC index.
  6. brownizs

    brownizs In the Trades

    Messages:
    196
    Location:
    Springfield, IL
  7. MJ32V

    MJ32V New Member

    Messages:
    9
    Location:
    NY
    That should do it (for now). Thanks guys!

    MJ
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