Southwire 18/5 Thermostat Wire, 250 ft – Brown Solid Copper CL2 Cable for HVAC & Alarm Systems

Discover the Southwire 18/5 Thermostat Wire, designed for dependable low-voltage control in heating, cooling, and alarm systems. This 250 ft spool features solid copper conductors and a brown jacket, delivering a durable, easy-to-manage solution for residential and commercial installations. With a Class 2 power-limited rating, it is suitable for thermostat control circuits while remaining compliant with standard electrical requirements.

Key specifications and benefits

• Solid copper conductors for low resistance and solid, reliable connections
• 18 gauge, 5 conductor configuration in a brown PVC jacket
• Class 2 Power-Limited Circuit Cable, suitable for thermostat control applications
• Sunlight resistant insulation and RoHS compliant materials for versatile indoor use
• UL Standard 13 components, RoHS compliance, and OSHA acceptable for broad installations

In addition to its electrical capabilities, Southwire emphasizes ease of use. The wire is designed to strip more cleanly, resist tearing, and minimize burn-through, helping reduce time, labor, and materials during installations. The dual-purpose design supports both heating and air conditioning controls, making it a sensible choice for projects that require flexibility and future-proofing.

What makes it a practical choice

• Made in America with a focus on quality and reliability
• Brown jacket provides clear, discrete wiring suitable for seen or hidden runs
• 6 mils PVC insulation adds a protective layer against wear inside walls and conduits
• Full line compatibility with Southwire’s copper and aluminum cable offerings

Whether you’re wiring a thermostat, setting up HVAC controls, or extending a bell or alarm system, this wire’s robust construction supports steady performance while offering installation ease and potential long-term savings. While results vary by project, the combination of solid copper, insulated protection, and industry compliance positions this product as a capable option for many low-voltage residential and commercial settings.