Cerro Wire’s shielded riser cable for security, intercom/PA sytems, sound/audio systems is made up of 18 and 22 AWG 7 stranded bare copper conductors cabled together with a 2-in. nominal left-hand lay with a nylon ripcord for ease of jacket stripping. The jacket is a 0.014-in. nominal wall gray flame-retardant PVC.