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Thread: Some pics to talk about

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  1. #1

    Default Some pics to talk about

    Romex 10/2 w/g
    Romex 10/3 w/g
    Romex 12/2 w/g
    Romex 12/3 w/g
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  2. #2

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    Time to do some derating calculations.
    http://www.inspectpa.com/forum/forum.php
    My answers are based mostly on the ICC codes. Advice given is my personal opinion and every person performing work should acquire a permit from his/her jurisdiction and get the work inspected. My opinions are not directions to follow for DIYs or professionals

  3. #3
    Licensed Electrical Contractor Speedy Petey's Avatar
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    Quote Originally Posted by jar546 View Post
    Time to do some derating calculations.
    Not if they remove that tape.


    WTH is all that #10 for???
    Answers based on the 2008 & 2011 NEC. If you're on the '14 already I feel sorry for you.

  4. #4
    Code Enforcement codeone's Avatar
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    Quote Originally Posted by Speedy Petey View Post
    Not if they remove that tape.


    WTH is all that #10 for???
    Check out the 2008 NEC. Removing the tape doesnt matter. Its still considered bundling, you need to derate!

  5. #5
    Extreme DIY Homeowner Scuba_Dave's Avatar
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    So that's where my flux capicitor went
    DIY Handyman (not 4 hire)
    I have enough to do to my own house

  6. #6
    Licensed Electrical Contractor Speedy Petey's Avatar
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    Quote Originally Posted by codeone View Post
    Its still considered bundling,
    How do you figure? What would you consider "maintaining spacing"?
    Last edited by Speedy Petey; 02-14-2009 at 05:35 PM.
    Answers based on the 2008 & 2011 NEC. If you're on the '14 already I feel sorry for you.

  7. #7
    Code Enforcement codeone's Avatar
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    Quote Originally Posted by Speedy Petey View Post
    How do you figure? What would you consider "maintaining spacing"?
    May be bundling in the sense you are used to is not the correct term I should use. However it would have to be derated per 2008. I personally would still say it is bundled for derating purposes there is no spacing between those conductors and would not pass the job. See below note last two paragraphs.

    334.80 Ampacity. The ampacity of Types NM, NMC, and
    NMS cable shall be determined in accordance with 310.15.
    The ampacity shall be in accordance with the 60C (140F)
    conductor temperature rating. The 90C (194F) rating
    shall be permitted to be used for ampacity derating purposes,
    provided the final derated ampacity does not exceed
    that for a 60C (1400 P) rated conductor. The ampacity of
    Types NM, NMC, and NMS cable installed in cable tray
    shall be determined in accordance with 392.11.

    Where more than two NM cables containing two or
    more current-carrying conductors are installed, without
    maintaining spacing between the cables, through the same
    opening in wood framing that is to be fire- or draft-stopped
    using thermal insulation, caulk, or sealing foam, the allowable
    ampacity of each conductor shall be adjusted in accordance
    with Table 310.15(B)(2)(a) Exception shall not apply.

    Where more than two NM cables containing two or more
    current-carrying conductors are installed in contact with thermal
    insulation without maintaining spacing between cables the
    allowable ampacity of each conductor shall be adjusted in
    accordance with Table 310.15(B)(2)(a)

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