Wiremold on ungrounded circuit

Discussion in 'Electrical Forum discussion & Blog' started by Spielbass, Jun 10, 2021 at 12:22 PM.

  1. Spielbass

    Spielbass New Member

    Joined:
    Thursday
    Location:
    Ventura, CA
    It appears to me that NEC 250.86 allows for extending a circuit with raceway (Wiremold) on an ungrounded circuit up to 25 feet. Can someone please verify whether I read that correctly. Thanks for your help.

    Neil
     
  2. wwhitney

    wwhitney Well-Known Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    Based on the question, you are presumably asking about metallic Wiremold. As Wiremold is usually run exposed, how would you comply with part (4) of Exception (1) which requires the Wiremold to be "guarded against contact by persons"? If it's covered up, a different metallic raceway would make more sense. But as the circuit is ungrounded, I would suggest a non-metallic wiring method. E.g. non-metallic wiremold.

    Cheers, Wayne
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. WorthFlorida

    WorthFlorida The wife is still training me.

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
  5. Spielbass

    Spielbass New Member

    Joined:
    Thursday
    Location:
    Ventura, CA
    Sorry I wasn't more specific. Yes, I had planned to use non-metallic Wiremold.
     
  6. Spielbass

    Spielbass New Member

    Joined:
    Thursday
    Location:
    Ventura, CA
    I have a receptacle behind a bed, and I want to use the Wiremold to extend out to each side of the bed, about 3 feet in either direction. One duplex receptacle on either side of the bed.
    I've read the exemptions, and by using non-metallic Wiremold this seems to meet all, except that "guarded from contact by persons" is a bit ambiguous. Does that mean the Wiremold has to be in a place where nobody can possibly touch it?
     
  7. wwhitney

    wwhitney Well-Known Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    If you use non-metallic wiremold and a non-metallic box, then 250.86 is moot, as there are no metallic raceways or enclosures involved.

    If your receptacle behind the bed does not have an EGC, then it should be a 2 prong receptacle, unless you either (a) comply with 250.130(C) to provide an EGC or (b) comply with 406.4(D).

    Since 406.4(D) only discusses receptacle replacement, I believe you are not allowed to extend an ungrounded circuit without complying with 250.130(C) to turn it into a grounded circuit. Edit: Often complying with 250.130(C) is no easier than running a new grounded circuit to the area, which is then a better solution.

    Cheers, Wayne
     
    Last edited: Jun 10, 2021 at 10:00 PM
  8. Norcal01

    Norcal01 Member

    Joined:
    Aug 16, 2008
    Extending the circuit triggers AFCI, & tamperproof receptacle requirements, better to run a new circuit rather then deal with ancient wiring.
     
Similar Threads: Wiremold ungrounded
Forum Title Date
Electrical Forum discussion & Blog Can NM Romex Be Run In Wiremold? Jun 1, 2017
Electrical Forum discussion & Blog Ungrounded light fixture Jan 17, 2016
Electrical Forum discussion & Blog Home PC, ungrounded outlet and CFCI Apr 2, 2015
Electrical Forum discussion & Blog Ungrounded Light Fixtures Jun 16, 2010
Electrical Forum discussion & Blog 12/2 with ground but outlet ungrounded Dec 19, 2009

Share This Page