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    Voltages

    Hi Question can you run 480 volt and 110 volt in the same conduit. I was told you can not. I know you can not run low voltage such as 24, etc
    like data, or for instrumentation . I should could use a right answer . Please Thank you

    #2
    as long as all conductor ajckets are rated for the higher voltage, i.e., THHN/THWN-2 is rated at 600 volt --no problem
    RichB N7NEC

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      #3
      And you can often run low voltage wires in the same conduit, as long as the wiring method and components of the LV circuit are not limited power.

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        #4
        Originally posted by GoldDigger View Post
        And you can often run low voltage wires in the same conduit, as long as the wiring method and components of the LV circuit are not limited power.
        Funny I would say rarely, what low voltage did you have in mind?

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          #5
          Originally posted by iwire View Post
          Funny I would say rarely, what low voltage did you have in mind?
          Well, a 24 or 48V DC power distribution network maybe? Not sure about that.
          Or a class 1 circuit at any voltage if it is associated with the power wiring.

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            #6
            Originally posted by GoldDigger View Post
            Well, a 24 or 48V DC power distribution network maybe? Not sure about that.
            Or a class 1 circuit at any voltage if it is associated with the power wiring.
            You can only install the class 1 if it is with associated equipment power wiring as you said. You can't have class 2 or class 3 in the same conduit, even if it is associated.
            The world is round, you will get there no matter what path you take.

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              #7
              Originally posted by rlundsrud View Post
              You can only install the class 1 if it is with associated equipment power wiring as you said. You can't have class 2 or class 3 in the same conduit, even if it is associated.
              Which getting back to OP question of 480 and 120 volt circuit in same raceway - if one of those circuits is a class 1 control circuit (a little rare but 480 V can be used as a control circuit) they can only be together if associated with one another.
              I live for today, I'm just a day behind.

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                #8
                Originally posted by rlundsrud View Post
                You can only install the class 1 if it is with associated equipment power wiring as you said. You can't have class 2 or class 3 in the same conduit, even if it is associated.
                You can if you seperate them--llike with tubing as a sleeve or innerduct

                But still probably easier ands cheaper to run 2 seperate small raceways
                RichB N7NEC

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                  #9
                  Originally posted by RichB View Post
                  You can if you seperate them--llike with tubing as a sleeve or innerduct
                  This is the second time in a few days someone has made that suggestion.

                  I don't believe there is a code compliant way to do this with EMT or RMC etc.

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                    #10
                    Originally posted by iwire View Post
                    This is the second time in a few days someone has made that suggestion.

                    I don't believe there is a code compliant way to do this with EMT or RMC etc.
                    I agree--I should probably have been more clear--like this--

                    if you can separate them in a conduit, say with some tubing, i.e., inner duct, then it would be acceptable,,, the only outer duct I am aware of for this is RGS, PVC or HDPE, either factory or field assembled.

                    As Edgar said in "Men in Black"--There, Is this better?
                    RichB N7NEC

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