Light in crawl space

Discussion in 'Electrical Forum discussion & Blog' started by khayes, Nov 13, 2009.

  1. khayes

    khayes New Member

    Joined:
    Oct 25, 2005
    Location:
    Alpharetta, GA.
    I want to install a single light in our crawl space with a switch near the access door. I want to tap into a line feeding a receptacle to the room just above the crawl space. The circuit is 20amp/#12Guage. Is it allowable to run a #14G leg off that circuit for the new light?
    Thanks for any advice.
     
    Last edited: Nov 13, 2009
  2. jbfan74

    jbfan74 Electrical Contractor

    Joined:
    Jun 14, 2007
    Occupation:
    Electrical Contractor
    Location:
    Newnan, GA
    No. It must be #12 wire.
     
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    No, as I understand it. ANy wire up to the fixture must be sized for the protection device it is connected to (it can be larger, but not smaller). So, on that 20A circuit, you'd need to use 12g wire. There may be an exception...see what the pros have to say.
     
  5. khayes

    khayes New Member

    Joined:
    Oct 25, 2005
    Location:
    Alpharetta, GA.
    Thanks guys - that's what I suspected.
     
  6. Billy_Bob

    Billy_Bob In the Trades

    Joined:
    Apr 2, 2008
    Here is an official answer to that very question...
    http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=10538

    And always best to ask your local electrical inspector. Local areas can modify the national rules as they see fit.

    My personal opinion is that it is best to use all 12 ga. wire on a 20 amp circuit. (Be consistent in the wire size used for each circuit and that it be of the appropriate size for the breaker on that circuit.)
     
  7. Cass

    Cass Plumber

    Joined:
    Nov 12, 2005
    Location:
    Ohio
    You can use a larger wire size than the breaker that is feeding the circuit but you can never use smaller...using smaller is a fire waiting to happen...
     
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