Southwire Thermostat Wire is an 18/7 thermostat and bell cable designed specifically for use in heating and air conditioning controls, as well as alarm systems. This wire features insulation made from polypropylene and is protected by a durable brown PVC jacket, making it suitable for both indoor and outdoor applications. It is designated as a Class-2 Power-Limited Circuit Cable, ensuring safety and reliability. The cable is sunlight resistant and can operate effectively in temperatures up to 140 degrees Fahrenheit, with a maximum voltage rating of 150 volts. Southwire Thermostat Wire is UL listed and CSA , ing peace of mind for quality and compliance. The wire consists of seven solid copper conductors, each sized at 18 AWG, and comes packaged on a spool for convenience. Model Number: 64170444