Plenum or non-plenum rated ...

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mecojax01

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In a hospital, we have all low voltage systems (nurse call, fire alarm, sound, CAT5E teledata, intercom, etc.) run above ceilings on J-hooks. Both the supply and return air are 100% ducted, so the above-ceiling space is not a return air plenum. We are having a bit of a debate whether or not this cabling is permitted to be non-plenum rated. Yes? No? Why or why not?
 
Re: Plenum or non-plenum rated ...

The air space above the ceiling is not environmental air distribution system if the HVAC is completely ducted. This just makes it another ordinary space and thus the wriing methods are not required to be plenum rated.
 
Re: Plenum or non-plenum rated ...

CMR all the way.
It really amazes me how much money is just left in the ceiling by the people that use CMP exclusively because they don't know how to tell what is necessary.
While it is ok code-wise as CMP is above CMR in the hierarchy.
But why pay about twice for the wire when you don't have to ??

[ January 27, 2006, 08:18 AM: Message edited by: mkoloj ]
 
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