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1 members (Scott35),
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Key:
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Global Mod,
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Joined: Feb 2004
Posts: 17
OP
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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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Joined: Aug 2003
Posts: 1,374
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Basically, everything has to be plenum rated if its in a plenum ceiling. ![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif)
Ryan Jackson,
Salt Lake City
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Joined: Nov 2000
Posts: 2,148
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Don(resqcapt19)
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Joined: May 2004
Posts: 8
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Joined: Dec 2001
Posts: 300
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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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