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PLC fused circuits - Conductor sizes and rating

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    PLC fused circuits - Conductor sizes and rating

    I have installed a CL3R 16AWG 2C in conduit from a junction box to 24VDC transmitters, 24VDC valve positioners and 24VDC solenoids. My customer, even though no specs were given is saying I need to replace the cable with 600V insulation siting 725.49(B). I received confirmation that the wire complies with 725 as vendor wrote: "This cable is CL3R and it looks to meet article 725". A couple of questions: 1) Does this circuit indeed fall under 725? 2) The manufacturer gave an out by saying "looks to" so should I use that as a defense. our company has already finished all conduit work and the cost to upsize conduit and wire for this project is +30K so I am looking for any opportunity to reject the demand for 600V wire. any help would be appreciated.

    #2
    Is your cable in its own conduit or sharing with other conductors ?
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

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      #3
      conductors are all part of the same system and are the same class circuits

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        #4
        also, yes there are up to 15-20 of these cable in one conduit. they do not have multiple class circuits. the customer is declaring them all class 1 circuits and thus citing 725.49(B) for 600V cable

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          #5
          Do you know the Class power supply ?
          Beyond that, as far as 725.48(B) there was a change in then '14 Code:
          [COLOR=#0000ff](B) Insulation. Insulation on conductors shall be rated for the system voltage and not less than 600 volts[/COLOR]
          At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

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