Conduit fill and PV circuits

Just to review, when counting current carrying conductors in conduit with PV, DC strings, both wires are counted as CCC. Seems like a definite YES to me. 

Also, when sizing conduit for fill, all conductors are counted in regards to the 40% fill rule for over 3 conductors. Correct?


  • BB.BB. Super Moderators, Administrators Posts: 32,006 admin
    As I understand code (which is not very much)--Yes, all conductors are counted as if they are carrying current when calculating fill.

    Bumping "discussion" in case somebody who knows more than I can add information.

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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