... conduit and for fixed, protected installation of Wiring Burglar Alarm, Public Address Systems, Intercoms, Telephone Stations, Speakers ... Standards BS4737: Insulated cables, PVC insulated for intruder alarm systems NEC 725/800: CM / CL2, ... apparatus, electronic equipment, automatic devices, anti-theft alarming system and building intercom system.Test equipment :Extruding Machine for cables: ...