Coleman Cable 500' 18/3 Thermostat Wire is a versatile low-voltage cable designed for a variety of applications such as thermostat installations, heating and air conditioning systems, burglar alarms, intercom systems, and doorbells. It features insulated solid conductors and a fire-resistant jacket that helps prevent the spread of fire. Rated for 300 volts, this brown wire meets Type CL2 standards and is UL listed, ensuring reliable safety and quality for all your wiring needs. Model Number: 553030507