New project necessitating a "plenum" rating 1

[turk182]

I have been assigned a new project for an electrical device for use in a &quot;ceiling tile / suspended ceiling&quot; setting.<br>
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Does anyone know what UL or NFPA plenum ratings I will need on my enclosure, cable, and connectors.<br>
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Plenum rated cat-5 cable is available, but I am wondering about the connection at the enclosure which is in an air-handling space.<br>
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Any help / insight would be greatly appreciated.