1It is a cable that is run in the air-handling space between walls, under structural floors, and ?

... above drop ceilings? or:... above drop ceilings?or:I'm not understanding the question, but if you are asking what type of wire is rated to go in

... above drop ceilings?

or:... above drop ceilings?

or:I'm not understanding the question, but if you are asking what type of wire is rated to go in air circulating spaces such as those listed, and even air ducts, then the answer would be plenum rated wire.

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