plenum cable(redirected from Plenum cabling)
Cable that can be (legally) installed in the plenum (the space between a ceiling and the floor above it). Such cable is (usually) teflon-coated so that it will not give off toxic fumes when burned. In some parts of the world such cable is required by law.
A jacket having low flame- and smoke-producing properties; specifically de-signed for use in the plenum, 1 formed by the space between a suspended ceiling and the structural floor above; such space often is used for return air in a heating and/or cooling system in a building.