Two 12-4 Romex cables through the same floor joist holes

Discussion in 'Electrical Forum discussion & Blog' started by pex006, Jul 5, 2014.

  1. pex006

    pex006 Member

    Joined:
    Jul 30, 2012
    Location:
    Pittsburgh, Pennsylvania
    Hi. Can two 12-4 Romex cables be put through the same floor joist holes. The holes have about a 1 inch in diameter? They would run together through three floor joist holes for about 6 feet before separating and entering a junction box. I thought derating wouldn't apply since there are only 8 current carrying conductors.
     
  2. Speedy Petey

    Speedy Petey Licensed Electrical Contractor

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    Licensed Electrical Contractor
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    NY State, USA
    It's fine.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

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    Electricians sometimes put as many wires through the hole as will fit.
     
  5. bluebinky

    bluebinky Member

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    Uh oh - the R word.

    Take you time when pull them so you don't burn off the sheathing. One inch sounds kinda tight for 2 x 12-4...
     
  6. pex006

    pex006 Member

    Joined:
    Jul 30, 2012
    Location:
    Pittsburgh, Pennsylvania
    Thanks for the replies everyone. The holes might be a little bigger than 1 inch. I ran two 12-4 through to see if they would fit and they went through pretty easily.
     
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