SOUTHWIRE Thermostat Wire: 18 AWG Conductor Size, 8 Conductors, 250 ft Overall Lg

Southwire thermostat wire connects HVAC thermostats, zone valves, and boiler controls to heating and cooling equipment. The 18 AWG, 8-conductor, 250 ft length supports multi-stage systems and heat pumps in residential and light commercial installations.

This Southwire thermostat wire has 18 AWG conductors, 8 conductors total, 250 ft overall length, 150 V voltage rating, and CL2 classification. It is nonplenum-rated, suitable for general indoor use per NEC Article 725. The MPN is 553080401.

3G Electric supplies Southwire thermostat wire worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Southwire products and support procurement across 14 departments including electrical and HVAC.

Install Southwire CL2 thermostat wire per NEC Article 725 for Class 2 circuits. Use in walls or ceilings, not plenums. Strip insulation carefully to avoid nicking conductors, maintain polarity, and secure with staples or cable ties. Test continuity before connecting to thermostat and equipment.