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Thread: Derating ?

  1. #1

    Derating ?

    I had a decision today with a electrican about conductors ampacity correct factors , we a pulling in two #18 thhn conductors for dimming control with the branch circuit conductors do have to Apply the these two dimming conductors to table 310.15B(2). Thanks

  2. #2
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    Assuming line voltage and both are CCCs, yes.
    "Electricity is really just organized lightning." George Carlin


    Derek

  3. #3
    Join Date
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    Quote Originally Posted by jumper View Post
    Assuming line voltage and both are CCCs, yes.
    More than likely these are the (2) 0-10v leads.

    JAP>

  4. #4
    Quote Originally Posted by jap View Post
    More than likely these are the (2) 0-10v leads.

    JAP>
    Yes they are0-10v leads

  5. #5
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    Quote Originally Posted by jkrauss View Post
    Yes they are0-10v leads
    Technically speaking, if they are Class 2 or Class 3, then no derating. But if you have reclassified the dimming circuit as Class 1 to allow you to run them loose in the same raceway with power, you may have to count them. See the post relative to Class 1.

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