65676944 Thermostat Wire, 18/8 Solid Copper, 250 Ft

The Southwire 250 ft. 18/8 Solid Copper Thermostat Wire is a low-voltage control cable designed for residential and commercial HVAC, thermostat, heating, cooling and alarm system installations. This general-purpose 8-conductor cable features solid uncoated copper conductors that deliver excellent electrical conductivity and reliability for thermostat connections and complex control wiring setups. Whether you're upgrading an existing system, performing maintenance, or completing a new installation, this UL-listed wire meets recognized electrical safety standards and provides the dependable performance required for secure, efficient thermostat operation.

Built to last, the cable combines solid copper construction with polyvinyl chloride (PVC) insulation and a sunlight-resistant brown PVC jacket. The brown sheath offers both easy color identification and protection against UV exposure, making it suitable for indoor installations where environmental durability matters. The cable meets UL 1581 vertical flame tray test requirements and is rated for 60 degrees Celsius continuous operation in air, ensuring safe performance across a wide range of conditions.

Features and Benefits

• Solid Copper Conductors: Eight color-coded copper conductors (red, white, green, blue, yellow, brown, orange and black) provide excellent conductivity and allow for multiple connections in complex HVAC and control systems.
• UL Listed and ETL Certified: This Type CL2 power-limited circuit cable meets UL 1581 standards and is ETL listed, ensuring safety and compliance with electrical codes.
• UV-Resistant Brown Jacket: The 15 mil thick PVC jacket resists sunlight and UV exposure, offering long-term durability and protection against environmental factors.
• NEC Article 725 Compliant: Designed for use in accordance with the National Electrical Code Article 725 for power-limited circuits.
• Versatile Low-Voltage Applications: Ideal for air conditioning controls, heat pumps, heating controls, thermostats, bell systems and alarm installations.
• Thermal Rating: Rated for 60 degrees Celsius continuous operation, providing reliable performance across typical indoor environmental conditions.

Specifications

• Brand: Southwire
• Model: 65676944
• Length: 250 feet
• Conductor Gauge: 18 AWG
• Number of Conductors: 8
• Conductor Material: Solid uncoated copper
• Insulation Material: Polyvinyl chloride (PVC)
• Jacket Color: Brown
• Jacket Thickness: 15 mil
• Overall Cable Diameter: Approximately 202 mil
• Temperature Rating: 60 degrees Celsius continuous in air
• Certifications: UL listed, ETL listed Type CL2, Meets UL 1581 vertical flame tray test
• Voltage Rating: 150 V
• Code Compliance: NEC Article 725