Master Flex Cables Wire and cable has been a staph provider of Fire Alarm- Security (FAS) cable for more than a decade, providing reliable interconnection within fire alarm security systems, smoke and fire detectors, fire alarms and emergency communication systems. Our standard Non-Shielded and Shielded Fire Alarms are the workhorses of the fire alarm cable industry. Need to pull a fire alarm cable without a conduit? Use one of our many Armoured Fire Alarm Cables.