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Thread: box fill

  1. #1
    Join Date
    Aug 2012
    Location
    RI
    Posts
    77

    box fill

    how come field straps count as a deduction for box fill but wire nuts do not
    .....Still just happy to be here.....

  2. #2
    Join Date
    Jul 2003
    Location
    New Jersey
    Posts
    23,531
    What are field straps?
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  3. #3
    Join Date
    Jul 2007
    Location
    Clark County, NV
    Posts
    147
    You mean a device strap/yoke, like these?

    At first I was thinking about the internal cable clamps, but the word "field" in the question has me confused.


  4. #4
    Join Date
    Feb 2003
    Location
    Huntsville Alabama
    Posts
    2,132
    I believe he means internal clamps. I too have wondered why they are counted, but wire nuts are not.

    Sent from my Coolpad 3622A using Tapatalk
    Some people are like slinkies. They serve absolutely no useful purpose. But still put a smile on your face when pushed down a flight of stairs.

  5. #5
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    33,072
    The methods of determining box fill are far from perfect, but seem to work most of the time.

    I can find situations where allowed fill is exceeded yet there is a lot of room in the box,as well as some situations that are within the rules yet it is difficult to tuck conductors/devices into the box.

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