SYSTON 18AWG 2 Conductor Thermostat Cable is built with solid bare copper conductors, ensuring superior conductivity, minimal voltage drop, and long-term reliability for low-voltage control wiring. This 300V Low-Voltage Thermostat Cable (CL3 Rated) offers excellent insulation and a high safety margin, making it ideal for thermostats, HVAC systems, furnaces, air conditioning equipment, doorbells, annunciator systems, intercoms, security systems, and audio/visual installations, while meeting Class 3 (100VA) power-limited standards.The cable is Riser Rated - CMR, CL3R, FT4, providing flame-retardant performance for vertical runs between floors in residential and commercial buildings. Compared with lower fire ratings like CL2 or CM, which are limited to single-floor or in-wall use, CMR/CL3R/FT4 cables meet stricter fire codes and offer safer installation in risers, shafts, and multi-story applications, making them the professional choice.Installation is simplified with a round, slick PVC jacket and built-in rip cord for quick jacket removal. The jacket is sunlight resistant, flame retardant, and RoHS compliant, suitable for both indoor and outdoor use. Packaged in RhinoPac tangle-free boxes, the cable features E-Z footage markings and zone legends to save time and ensure accuracy on the job site.This thermostat wire combines professional-grade safety and durability with DIY-friendly installation features, delivering dependable low-voltage wiring for any project.