Wire, Sound And Security, Riser Cable Type, Conductor Type Stranded, Number of Conductors 2, Conductor Size 18 AWG, Conductor Color Code Table Number 1, Nominal Outside Dia 0.156 In, Spool/Coil Length 500 Ft, Voltage 300, Color Gray, Insulation Semi Rigid PVC, Temp Range -20 C To 75 C, Standards NEC Article 725 Type CL3R, NEC Article 800 Type CMR, California State Fire Marshall, Jacket Material PVC Sound, Alarm, and Security Cable, Types CMR and CMPSecurity and Alarm CableRiserRipcord included. 500-ft., 22-ga. unshielded riser cable 1ATD8, 1ATJ1, 1ATG9, and 1ATJ2 are NEC Article 800 Type CMR/CMX, temp. range to 140 F.For burglar alarms, intercoms, PA systems, and sound systems. Stranded or solid bare copper conductor per ASTM B-3, B-8, and B-286. Jacket has sequential footage markings to facilitate installation. UL Listed and California State Fire Marshall Approved. Shielded cable has an aluminum/polyester Flexfoil shield with stranded, tinned-copper drain wire.Compliance: NEC Article 800 Type CMR and Article 725 Type CL3R, except 500-ft. 22-ga. unshielded riser Temp. range: -4 to 167 F, except 500-ft. 22-ga. unshielded riser Rated for 300V