low voltage wiring

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brichter

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Could some of you fellows give me an idea as to what type of cable you use in walls to supply low voltage pucks supplied at 12 volts from remote transformers. Have used class 2 speaker wire in the past but an inspector is objecting to this.
 
Most of the puck light have specific instruction to use romex. In fact, I've never seen any puck lights that didn't specially call out NM cable. I suspect they want that to get a certain temp rating. Speaker wire insulation in puck lights turns real soft, real quick.
 
brichter said:
Thanks, Marc. I'mm talking about puck lights that already have leads attached, in fact the current project involves LED pucks @ 140 milliamps each.
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Oh, I see. Is it a class 2 power supply? Is the proposed cable class 2 rated?
 
brichter said:
Could some of you fellows give me an idea as to what type of cable you use in walls to supply low voltage pucks supplied at 12 volts from remote transformers. Have used class 2 speaker wire in the past but an inspector is objecting to this.
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Any wiring method mentiond in chapter 3 of the NEC.
 
stickboy1375 said:
Any wiring method mentiond in chapter 3 of the NEC.
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That's the easy answer out....

One thing I ran into a month ago is we ran #10 2-wire Underground wire- the type they use for outdoor LV applications, inside to some Trac 12. This was all fine and dandy as far as we could tell, and was really nice to pull because its got a really nice strand count; but like mdshunk was saying the temp ratings killed us.The hitch was that the transformer I was to run the wires into specified the need for 90 degree conductors inside the box. this wire was only rated for 60 degree. Due to the fact that it was LV it was a pretty easy fix. Whew..
 
alfiesauce said:
That's the easy answer out....

One thing I ran into a month ago is we ran #10 2-wire Underground wire- the type they use for outdoor LV applications, inside to some Trac 12. This was all fine and dandy as far as we could tell, and was really nice to pull because its got a really nice strand count; but like mdshunk was saying the temp ratings killed us.The hitch was that the transformer I was to run the wires into specified the need for 90 degree conductors inside the box. this wire was only rated for 60 degree. Due to the fact that it was LV it was a pretty easy fix. Whew..
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It certainly is not the easy way out, the wire your using is for outdoor use only. What made you think it was fine and dandy anyhow?

Take a look at article 411 as well.
 
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To which part might you be referring too? Other than the 60 degree issue, in retrospect, I could not find another problem with the wire we used, nowhere could we find something that said it was only rated for outdoor or direct burial only use.
 
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