Southwire Company Thermostat Cable, Number of Conductors 8, 18 AWG, Plenum, 250 ft., White

Plenum-rated thermostat wire is electrical cable that has been rated to run through the air-circulation spaces in buildings, usually located between the structural and suspended ceiling or under a raised floor. It is used to connect thermostat controls to a main power circuit via the ceiling or floor. It has a flame-retardant jacket that, in the event of a fire, emits fewer harmful fumes and is less toxic than nonplenum-rated thermostat wire.

Thermostat wire is electrical cable that connects thermostat controls to a main power circuit. It is typically used in commercial buildings to wire heating and air conditioning controls, as well as bell and fire alarm systems. It consists of multiple insulated conductors encased inside a protective jacket. Each conductor is color coded to help ensure the correct connection to the control board.