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Old 12-03-2011, 08:19 AM   #1
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What type of wire should I be using?


I'm wiring a string of LED's that will be operating at 12 volts. I'll be running the wire underground. My personal requirements are that the outer insulation be black, and that the conductors are stranded copper minimum 16 awg. I've done some research and believe that UL1493 wire would be OK, but are there other options? I only need two conductors right now, but in the future might want the same type wire with multiple conductors. Someone else suggested UL 2464 to me, but I'm not sure of his credibility and couldn't find any supporting info on the web.

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Old 12-03-2011, 08:25 AM   #2
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What type of wire should I be using?


What are these lights for. How far underground do you have to run?

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Old 12-03-2011, 09:15 AM   #3
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What type of wire should I be using?


It's homemade landscape lighting, right now the run is about 30 feet, but it might get a little longer. Though I'm not sure why you asked. I found a voltage drop calculator on line and the gauge seemed to be OK.
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Old 12-03-2011, 09:23 AM   #4
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What type of wire should I be using?


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It's homemade landscape lighting, right now the run is about 30 feet, but it might get a little longer. Though I'm not sure why you asked. I found a voltage drop calculator on line and the gauge seemed to be OK.
He asked because you left out some important information, such as what the draw is going to be.

How did you do a load calculation with knowing the load??? The voltage and wire size are only part of the calculation.
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Old 12-03-2011, 09:47 AM   #5
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What type of wire should I be using?


10 lights, each light is two parallel circuits of (3) 3v 20ma LEDs and a 150 ohm resistor, (1/2 watt per light, 5 watts total, please correct me if I'm wrong) and the lights are to be installed in parallel. 16 awg is more than enough for this, and I just thought I would leave out the already solved parameters. Though a smaller gauge would be OK, I always prefer oversizing for extra safety and possible future additions. It's really the TYPE of wire I need to run 12 volts underground that I'm questioning, though I appreciate people making sure it isn't undersized.

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Old 12-03-2011, 10:05 AM   #6
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What type of wire should I be using?


Standard low voltage landscape wiring (any home center carries it).


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Old 12-03-2011, 10:18 AM   #7
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What type of wire should I be using?


I forgot you said LED. Unless you have a million of them then #14 or #16 is FINE.
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Old 12-03-2011, 10:24 AM   #8
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What type of wire should I be using?


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Standard low voltage landscape wiring (any home center carries it).
You are correct, but I'm looking for the technical spec, does anyone know. What does the NEC say for 12 volts underground, or what are the specs on UL 1493, or UL 2464? I'm asking the technical requirements.
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Old 12-03-2011, 10:33 AM   #9
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What type of wire should I be using?


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You are correct, but I'm looking for the technical spec, does anyone know. What does the NEC say for 12 volts underground, or what are the specs on UL 1493, or UL 2464? I'm asking the technical requirements.
I'm not sure why you need the specs for the wire.
That cable in the image above is specifically designed for low voltage underground landscape lighting.
We don't typically use UL specs for choosing our wire.

If you really need the UL spec I'm sure you can Google it and come up with something.
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Old 12-03-2011, 11:12 AM   #10
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What type of wire should I be using?


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You are correct, but I'm looking for the technical spec, does anyone know. What does the NEC say for 12 volts underground, or what are the specs on UL 1493, or UL 2464? I'm asking the technical requirements.
The UL specs you cite are not specific wires. 1493 talks about underground wiring and 2464 listed how different type cables are marked.
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Old 12-03-2011, 01:39 PM   #11
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What type of wire should I be using?


NEC must cite specific requirements for 12 volt underground wiring, I was wondering what they are and what UL ratings meet these requirements. This isn't easy to find out, at least for me, maybe somebody knows?
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Old 12-03-2011, 01:43 PM   #12
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What type of wire should I be using?


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NEC must cite specific requirements for 12 volt underground wiring, I was wondering what they are and what UL ratings meet these requirements. This isn't easy to find out, at least for me, maybe somebody knows?

Are you trying to get us to do your homework, normal situations we don't worry about the UL rating. Buy the above mentioned wire and you will be good to do.
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Old 12-03-2011, 08:40 PM   #13
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What type of wire should I be using?


Register on the NFPA website. You can use the NEC codebook online. Have fun.
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Old 12-03-2011, 10:16 PM   #14
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What type of wire should I be using?


Thank you,

I'm not telling you. Go spend $75 to find out what I probably already know.
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Old 12-04-2011, 05:38 AM   #15
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What type of wire should I be using?


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Thank you,

I'm not telling you. Go spend $75 to find out what I probably already know.
Pretty snarky attitude from someone looking for help.
I bet you're some kind of engineer, aren't you?

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