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Thread: Branch Circuit Partial Run in Conduit

  1. #1
    Geologist sjsmithjr's Avatar
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    Dec 2005
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    Default Branch Circuit Partial Run in Conduit

    For the life of me I can't fish the runs (NM) from a laundry room addition the last couple of feet back to the service panel. The service panel is mounted on an exterior wall. Is there a code compliant way come in the side of the box the last couple of feet via conduit? As I understand it 2x12-2 and 1x10-4 NM would violate the conduit fill rule. Is it permissible to strip the jacket once the NM enters the conduit?

    Thanks.
    Last edited by sjsmithjr; 10-13-2008 at 06:17 AM.
    -Sam Smith
    Licensed Professional Geologist - AL, TN, KY

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Default ?

    Use larger conduit.

  3. #3
    Geologist sjsmithjr's Avatar
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    Default

    I'm guilty of not provided sufficient information again. I believe 2x12-2 and 1x10-4 NM would overfill 2-inch conduit, and 2-inch is the largest I can run.
    -Sam Smith
    Licensed Professional Geologist - AL, TN, KY

  4. #4
    Electrical Contractor/Instructor jwelectric's Avatar
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    Default

    Can't run NM on the outside no matter what kind or size pipe you install

  5. #5
    Geologist sjsmithjr's Avatar
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    Can't run NM on the outside no matter what kind or size pipe you install
    Understood. I take it then the right way is to run NM to a junction box, then THHN from the box in conduit to the service panel?

    Bummer of a week for the electrician in the family to be out of pocket...


    Thanks,
    -Sam Smith
    Licensed Professional Geologist - AL, TN, KY

  6. #6
    Electrician Johnny C's Avatar
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    Oct 2008
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    Default Power supply to Panelboard

    Use type NM cable for the interior wiring to a "J box" and run conduit on the outside of the building with THWN or XHHW. The conductors must be suitable for a wet location.

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