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Joined: Dec 2000
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On the back page of Dec's issue of EC&M is an ad for this product, stating that it has the capacity for "28 12-gauge power cables".
It's a raceway for workstations, made of "LIGHTWEIGHT, easy-to-handle, scratch-concealing plastic". Barriers separate the V/D/V wiring from the power.
Let's see, now. Derated to 45% for the number of conductors.........What do you think??
I speld bad so itz eddditd
[This message has been edited by electure (edited 01-16-2002).]
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Joined: Oct 2000
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uhhh,.... one every 25" ?
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Joined: Dec 2000
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The point I saw was that even a 90° #12 conductor would be good for only 13.5 amps, and there isn't a way to limit the current to that.
(I can see plenty of IT and plant maintenance types thinking of stuffing 7-4 wire circuits through this stuff and putting them on 20 amp breakers)....as the ad might lead them to believe
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Joined: Oct 2001
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I thought in 4 wire circuits, only 2 were current carrying. That would mean 7-4 wire circuits would have 14 current carrying conductors and be derated by 50%. That means a #12 THHN should be able to handle 15 amps. I would think using fewer #10 THHN circuits at 20 amps would be more appropriate.
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Scott,
it's not quite the same as bundeling like numbers of #12 thhn together, the sheathing maintains seperation...
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I need to apologize for not explaining the product properly. It's like a plugmold. Here: www.panduitncg.com/whatsnew/TG_news_release.asp The ad shows 15 #12 THHN in the top section. "cables" was in a quote from them. By 4 wire circuits, I meant 3Ø, 3 hots, one neut 120 v circuits (probably nonlinear to boot) All conductors are current carrying conductors. What kind of 4 wire circuit has only 2 current carrying conductors??
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Joined: Oct 2000
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oh...ah...well that's surface raceway... ![[Linked Image]](https://www.electrical-contractor.net/ubb/redface.gif)
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Joined: Oct 2001
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Sorry, I assumed this was for office workstations using single phase. The four wires would then be 2 hots, a neutral and a ground. In that case only the two hots count as current carrying conductors.
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Joined: Aug 2001
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Scott, take a look at 352-4. Does it apply to the system your talking about?
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Joined: Dec 2000
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Nick, this stuff is plastic, and 352-4 applies to metal raceways. (and Ross, I did forget to include a grounding conductor in my count)
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