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Thread: Annex C in the 2017 do you add one for equipment grounding conductor

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    Annex C in the 2017 do you add one for equipment grounding conductor

    I am studying for an exam and one of the questions is....
    What is the maximum number of size 12 AWG THHN conductors permitted to be installed in a trade size 3/8 in flexible metal conduit where the fittings are outside the FMC .
    Annex C.3 gives an answer of 3 conductors.
    The answer sheet tells me to add one conductor for equipment grounding conductor, so that makes the answer 4
    Is this correct?

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    Look at Table 348.22 Maximum Number of Insulated Conductors in Metric Designator 12 (Trade Size 3 ⁄ 8 ) Flexible Metal Conduit (FMC) the asterisk at the bottom.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

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    Footnote under table. *In addition, one insulated, covered, or bare equipment grounding conductor of the same size shall be permitted.

    Sent from my ONEPLUS A6013 using Tapatalk

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    Annex C

    Thanks for all your help I was using the wrong table.

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    Quote Originally Posted by Chuck 1961 View Post
    Thanks for all your help I was using the wrong table.
    Yes that one is tricky because you need to look at Article 348 for FMC not just the fill in Annex C. I've taken several licensing exams and that question seems to be on every one.
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

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    Thanks

    Thank you infinity for clearing that up for me. It was definitely a tricky one that I will remember. Thanks and God Bless!

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    Thanks

    Thanks to Victor as well! You guys are the best!

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