A related question occurs to me. I would assume that the grey (PVC?) electrical conduit would not be allowed for plenum installation, rather you would have to use the thin walled metal, no? Otherwise, wouldn't putting PVC cable in PVC conduit defeat the purpose of using conduit so as not to get gassed by the Chlorine content of the PVC when the fire starts?<br>
<br><div class="gmail_quote">On Tue, Jul 31, 2012 at 1:45 PM, Jim Kinney <span dir="ltr"><<a href="mailto:jim.kinney@gmail.com" target="_blank">jim.kinney@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
NOTE: you can also run plenum cable in residential air ducts. Makes<br>
running wires much easier than drill-n-fish.<br>
<div class="HOEnZb"><div class="h5"><br>
On Tue, Jul 31, 2012 at 1:36 PM, Derek Atkins <<a href="mailto:derek@ihtfp.com">derek@ihtfp.com</a>> wrote:<br>
><br>
> On Tue, July 31, 2012 1:27 pm, Lightner, Jeff wrote:<br>
>><br>
>> My recollection was that plenum rated cable removed the need for conduit.<br>
>> (That is you need to either use plenum rated or conduit but not both.)<br>
>> I’m not licensed in this stuff myself so I could be wrong.<br>
><br>
> Plenum cable does remove the need for conduit because of the fireproof<br>
> rating of the plenum insulation. If you do not use plenum cable then you<br>
> MUST use conduit if the cables are run in an air return space. If the air<br>
> returns are ducted (like in a house) then you do not necessarily need<br>
> plenum cable.<br>
><br>
> Note that you MAY still run plenum cable in a conduit. There is nothing<br>
> wrong with that, per se. It's just more expensive and not necessary, but<br>
> it is not against code. So it's not "either-or".<br>
><br>
> Enjoy!<br>
><br>
> -derek<br>
> --<br>
> Derek Atkins <a href="tel:617-623-3745" value="+16176233745">617-623-3745</a><br>
> <a href="mailto:derek@ihtfp.com">derek@ihtfp.com</a> <a href="http://www.ihtfp.com" target="_blank">www.ihtfp.com</a><br>
> Computer and Internet Security Consultant<br>
><br>
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--<br>
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<br>
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