Southwire 18/6 Solid Thermostat Wire 250 Ft 18 Awg 6-conductor

Product Description

The SOUTHWIRE 18/6 SOLID THERMOSTAT BROWN is a Class 2 power-limited thermostat control cable supplied on a 250-foot spool. Built with 18 AWG solid conductors in a 6-conductor configuration, it is engineered for low-voltage thermostat wiring in residential and light commercial HVAC systems. The brown jacket identifies this as a non-plenum rated cable, meaning it is listed for installation in standard wall cavities, conduit, and non-air-handling spaces. HVAC technicians and licensed electricians are the primary installers of this cable type.

This cable is used in thermostat control wiring applications where a Class 2 circuit rating is required. Common installations include connecting thermostats to furnaces, air handlers, heat pumps, and zone control systems that require multiple control conductors. The 6-conductor layout provides enough wires to support multi-stage heating and cooling systems, fan control, common wiring, and auxiliary functions within a single cable run. The 250-foot spool length suits typical residential new construction and retrofit jobs without mid-run splices.

Key Features

• 18 AWG solid conductor construction for reliable low-voltage thermostat signal transmission
• 6 conductors provide wiring capacity for multi-stage HVAC systems and zone control
• Class 2 power-limited circuit rating meets NEC requirements for thermostat control wiring
• Non-plenum cable jacket rated for installation in standard wall cavities and conduit
• Brown jacket color for easy identification on the job
• 250-foot spool reduces the need for mid-run splices on typical residential installs

Compatibility

Designed as a Class 2 thermostat control cable suitable for low-voltage HVAC thermostat wiring applications in residential and light commercial systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician in accordance with NEC Article 725 governing Class 2 and Class 3 remote-control circuits. Power down the HVAC system at both the thermostat and equipment disconnect before pulling or terminating cable. This is a non-plenum cable and must not be routed through air-handling plenums or ducts — use a plenum-rated cable in those spaces. Secure the cable at intervals required by local code and protect it from physical damage where it passes through walls or framing.