> From: Pete Perkins
> Sent: Friday, March 16, 2007 8:43 AM
> 
>     What do we collectively know about needed ratings for 
> plastic plenums?  
> 
>     I believe this is more for electrical than telecomm, but 
> that's not clear yet.

Pete -

Considering that combustible materials are forbidden to be placed in
most ducts and plenums in the CEC and US NEC, I would think the
likelihood of a plastic plenum being safety certifiable is negligible.
Refer to NFPA 70, Section 300.22.


Regards,

Peter L. Tarver, PE
ptar...@ieee.org 



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