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#38092 - 05/14/04 08:11 PM plenum question  
seattleman  Offline
Member
Joined: Feb 2004
Posts: 17
Seattle, WA, USA
A guy was talking about some lonwork transformer being above the t-grid having to be plenum rated.

I thought a plenum was a duct or airway. What kinds of things have to be plenum rated and is above the t grid in an office a plenum?

I also remember a guy talking about have tie wraps used above the t grid had to be plenum rated. I'm not familar with this.


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#38093 - 05/14/04 08:47 PM Re: plenum question  
Ryan_J  Offline
Moderator
Joined: Aug 2003
Posts: 1,374
West Jordan, Utah, USA
Basically, everything has to be plenum rated if its in a plenum ceiling. [Linked Image]


Ryan Jackson,
Salt Lake City

#38094 - 05/14/04 08:50 PM Re: plenum question  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Look at 300.22(C).
Don


Don(resqcapt19)

#38095 - 05/14/04 09:02 PM Re: plenum question  
ProCircuit  Offline
Junior Member
Joined: May 2004
Posts: 8
Riverside, CA


#38096 - 05/14/04 09:03 PM Re: plenum question  
maintenanceguy  Offline
Member
Joined: Dec 2001
Posts: 300
Southern NJ, USA
Sometimes the space above a drop ceiling is used as the return air plenum. If so, everything in the ceiling has to be plenum rated. Sometimes the space below a floor or in a wall can be used this way too.



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