Type CMR Multi-Conductor Foil Shielded Computer Cable Applications: Type CMR Multi-Conductor Foil Shielded Computer 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. Also Known As: Shielded communication wire, shielded data communication cable, communication multipurpose cable riser, type CMR cable, riser-rated cable. Construction: Conductors: Fully annealed, stranded tinned copper per ASTM B-33. The pairs of a conductor are twisted/ Insulation: Premium-grade, color-coded S-R PVC. 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• NEC Article 800 Type CMR• CSA CMG• RoHS Compliant Directive 2002/95/EC• UL 70,000 BTU Vertical Tray Flame Test• CSA CMG Flame Test