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The Son of the Return of Different Voltages in Same Conduit/Raceway

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  • The Son of the Return of Different Voltages in Same Conduit/Raceway

    SO with all of this said....
    Can I legally run 480VAC (shielded 14/4) to my VFD's in the same wireway as my 120VAC, 24VDC, and devicenet wiring AS LONG AS I have a wireway barrier between them? Noting that the 24VDC and Devicenet wiring will be rated for 300V.

    or

    Can you "mix" 600V rated wire and 300V rated wire in the same raceway if there is a physical metal barrier between them?

  • #2
    Re: The Son of the Return of Different Voltages in Same Conduit/Raceway

    Yes

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    • #3
      Re: The Son of the Return of Different Voltages in Same Conduit/Raceway

      Yes, as long as one of two conditions are met. As long as thier is a barrier between the different voltages (Rated for highest voltages of course) or each conductor as an insulation rating for the highest voltage encountered.

      Although in the 2008 NEC, there was a change allowing DC and AC to be in the same wireway/conduit. While usually such things were verboten, I believe it had something to do with motor controls and the motor those controls were associated with. Jeez, I hope the state hurries up with my paperwork, I'd like to test our for my journeyman's ASAP before I forget everything.

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