An important item that is under the grouping known as 'Low Voltage Cables', is Type FAS (Fire Alarm & Signal Cable). This 300-volt cable, is specifically designed for the interconnection of security system elements, including fire protection signalling devices such as smoke and fire detectors, fire alarms, and two-way emergency communications systems.

Fire alarm installations in non-combustible buildings require mechanical protection, consisting of interlock armour, metallic conduit, non-metallic conduit embedded in concrete or installed under-ground. Armoured FAS Cable (Figure 11) provided with an interlocking aluminum armour, may be expected to have an appreciable cost advantage, compared with cables installed in rigid conduit.

Other common cables are LVT (Low Voltage Thermoplastic) and ELC (Extra Low Voltage Control), which are frequently used in residential installations for such items as door bells and thermostats.