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Thread: LED Class 2 wiring

  1. #1
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    LED Class 2 wiring

    411.5 (2) states we can use CL2 wiring in walls for lighting under 30v. does the listing of CL2 wire make any difference, since it is being supplied from a power limiting power source?
    Can I use 16/2 CL2 stranded speaker wire to supply 24v 3w cabinet lights. Trying to find a listed wire for this purpose and I'm coming up with similar CL2 wire or the same CL2 speaker wire?
    Is there a listing of CL2 and for the purpose it is being used?

  2. #2
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    No. There are dual listed cables such as CL2/CM. CM means communications and there you will find CAT5/CAT6, coax, shielded, etc. The CL2 listing means that it can be used with any listed Class 2 power source so for lighting you can use any CL2 or CL2/CM cable that meets your requirements (conductor size, environment, etc.)

    -Hal

  3. #3
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    You also need approval for concealed routing indoors, which many landscape cables do not have.

    Sent from my XT1585 using Tapatalk

  4. #4
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    Any cable with CL2 or CL3 or CM printed on it is suitable for installation concealed within walls and ceilings. Many landscape cables have no listing at all thus are only meant for use outside the structure. You are not allowed to run it even a few feet indoors to a transformer.

    -Hal

  5. #5
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    have an issue with an inspector saying my 16/2 CL2 speaker wire is not listed for use with 24v 3w Led cabinet lights. Checked with UL they do not give wire listings on specific use only power limited CL 2. Basically I can use any CL2 wire as long as its size properly. He recommended a wire labeled led premium, seems label is only for marketing
    this is UL listing for two wires one marked speaker the other led premium
    .Name:  ul listing.jpg
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  6. #6
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    Your inspector doesn't know what he's talking about. Those two listings you found tell nothing except two cables made by two different manufacturers. Is your inspector saying that the one made by the LED lighting manufacturer is the one you should be using?

    Maybe he has stock in that company.

    -Hal

  7. #7
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    seem to recall it has to do with flammability or byproducts of combustion if there's a fire.

  8. #8
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    Quote Originally Posted by Electric-Light View Post
    seem to recall it has to do with flammability or byproducts of combustion if there's a fire.
    That would have to be a listing difference. But there is none.

    Sent from my XT1585 using Tapatalk

  9. #9
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    The only issue that can arise is if wiring device or termination point can't handle stranded wires that small. A 16 AWG solid is one 16 AWG wire no matter which one you get, but there are many stranding configuration and when you use those in a terminal block, the strands just get pushed to the side and the wire pulls right out when you tug on it.

  10. #10
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    Quote Originally Posted by Electric-Light View Post
    seem to recall it has to do with flammability or byproducts of combustion if there's a fire.
    That would be denoted by CL2R or CL2P, riser and plenum respectively. Certainly not an issue here.

    Quote Originally Posted by Electric-Light
    The only issue that can arise is if wiring device or termination point can't handle stranded wires that small. A 16 AWG solid is one 16 AWG wire no matter which one you get, but there are many stranding configuration and when you use those in a terminal block, the strands just get pushed to the side and the wire pulls right out when you tug on it.
    That's on the installer to determine, not a Code issue.

    -Hal

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