>VGA cords to ceiling mounted projectors needed to be plenum rated
I must have missed this prior conversation, but this should only matter if the
cables actually run within 'plenum', not just a 'regular' suspended ceiling.
"PVC vs. plenum. ... It can be used for horizontal and vertical
runs, but only if the building features a contained ventilation system."
""Plenum" is the technical term for the space above a suspended ceiling when
it is used to return air from ventilated spaces such as offices to heating and
air conditioning equipment. To simplify construction, ceiling spaces are often
used as air-return plenums in office and other buildings."