Type CM Multi-Conductor Unshielded Communication Cable Applications: TYPE CM MULTI-CONDUCTOR UNSHIELDED COMMUNICATION CABLE is a cable used for communication purposes in public address systems, Intercoms, Internal telephones, and remote control circuits. Cable's voltage rating is 300 volts. The cable is color-coded in gray. Also Known As: Communication wire, data communication cable, communication multipurpose cable, type CM cable, in-wall rated communication cable. Construction: Conductors: Fully annealed, stranded tinned copper per ASTM B-33 Insulation: Premium-grade, color-coded polyethylene. Jacket: A gray PVC jacket with a temperature rating between -20°C to +80°C. Shield: An aluminum/polyester shield with a 25% foil overlap and a stranded tinned copper drain wire. Standards: • UL Style 2464• UL Style 2576• NEC Article 800 Type CM• CSA CMG• RoHS Compliant Directive 2002/95/EC• UL 70,000 BTU Vertical Tray Flame Test• CSA CMG Flame Test