Plenum Control Cable, 18/3, Nonshielded, 1000'

A "plenum control cable" is a type of electrical cable specifically designed to be used in a building's plenum space, which is the area above ceilings or below raised floors used for air circulation in heating, ventilation, and air conditioning (HVAC) systems; it must meet stringent fire safety standards due to the potential for rapid flame spread in these areas, meaning it is coated with a fire-retardant material that produces minimal smoke and toxic fumes if it burns.