Wiring Burglar & Security alarms, public address systems, intercoms, telephone stations, speakers, instrumentation, control ... or unshielded 4C, 6C, 8C, 10C, 12C, 14C and 20C security alarm cables Conductor: 0.6mm or 7 x 0.20mm plain ... : PVC flame retardant in white with thickness of 0.7mm Alarm Cable