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Thread: conduit body fill

  1. #1
    Join Date
    Mar 2004
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    1

    conduit body fill

    I have a project that I have to splice 3 hot, 2 neutral and 1 ground #10 wire in 3/4 T conduit body. It has 7.1 cu in. marking. How many wires can I splice in 3/4 conduit body?

  2. #2
    Join Date
    Feb 2003
    Location
    Illinois
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    20,684
    Quote Originally Posted by alworld View Post
    I have a project that I have to splice 3 hot, 2 neutral and 1 ground #10 wire in 3/4 T conduit body. It has 7.1 cu in. marking. How many wires can I splice in 3/4 conduit body?
    You do the calculations just like box fill calculations using Table 314.16(B) for the volume of the conductors. A device with a volume of 7.1 would be way too small for that application.
    Don, Illinois
    “When the people fear the government there is tyranny, when the government fears the people there is liberty.”
    Thomas Jefferson

  3. #3
    Join Date
    Nov 2007
    Location
    Columbus, Ohio
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    2,234
    I'd guess you would need a 1-1/4" TEE for those splices.
    With great power comes great resistance - times current squared, of course.

  4. #4
    Join Date
    Aug 2011
    Location
    California
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    19
    Like V said the t condulet is too small #10 count as 3.00 cu inches. If I am not mistaken and you have more than four current carrying conducters. Use a larger T condulet and some reducing bushings. And of course you can only splice if the LL or T is marked per code.
    Last edited by ACE1970; 09-19-11 at 06:37 PM.

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