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  1. #1
    Join Date
    Apr 2009
    Location
    Manchester, Vermont
    Posts
    298

    Cool NM cable feed into electrical by conduit

    Was in a large home today.

    Went into the room that house the electrical distribution equipment with
    all the circuit breakers.

    The panel in question had three length of 2" steel conduit. with a set
    screw connector and thread onto was a plastic 2" bushing.

    Into each length conduit, were multiple of NM cable.

    My question was there, and are there still provisions in the NEC code,
    that permit this.

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  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: NM cable feed into electrical by conduit

    Quote Originally Posted by Robert S. Mattison View Post
    The panel in question had three length of 2" steel conduit.
    How long was each conduit, and did each conduit go all the way up to the ceiling?

    Into each length conduit, were multiple of NM cable.
    EACH NM cable is required to be secured to the panel enclosure, with an exception (which almost never applies to dwellings).

    The information you give to the questions above will confirm if that installation meets the exception - most likely does not.

    Additionally, you will have derating issues, and how bad those issues are depends on several factors, including: do those NM cable go up an exterior wall; do the NM cables go into the attic; how many NM cable are in each conduit; how old the cables are; are the panels in a garage; etc.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  3. #3
    Join Date
    Apr 2009
    Location
    Manchester, Vermont
    Posts
    298

    Default Re: NM cable feed into electrical by conduit

    Thanks Jerry, I get the big picture now.


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