As briefly as I can state this:
2x4 grid ceiling, commercial building, fully sprinklered above and below grid ceiling.
Ceiling cavity is being used for conditioned air (supply) with ducted returns.
There is full access to the area above the grid ceiling, via extensive catwalks.
Installed in the ceiling grid are 2x4 HEPA self powered filter units, UL labeled and listed, with a "factory 5' cord and molded straight prong plug, and a factory speed control pot. Mfg instructions state that a "120 volt receptacle should be installed above or adjacent to the unit for connection"
Based on the layout, duplex 20 amp, 120 volt receptacles in deep 4" sq boxes were installed within reach of the factory cord.
An AHJ states the following:
400-8 prohibits cord/plug connections "above" a drop ceiling, as it is not visable.
"Cord" is not allowed within a plenum ceiling.
My reply:
IF you cannot connect the unit as the mfg intended, how can it be UL listed/Labeled??
The ONLY use for this unit is to filter conditioned air from a "plenum" ceiling, into a "clean" room area.
Comments are appreciated.
John
[This message has been edited by HotLine1 (edited 03-03-2003).]
