Aluminium Wire Armour (AWA) is used in single-core cables because it is non-magnetic. When an electric current passes through a cable it produces a magnetic field (the higher the voltage the bigger the field). The magnetic field will induce an electric current in steel armor (eddy currents), which can cause overheating in AC systems. The non-magnetic aluminum armor prevents this from happening.
Steel Wire Armour (SWA) is particularly useful in external or underground projects. As well as providing effective mechanical protection, the armor enables it to withstand higher pulling loads. SWA Cable is commonly used across a whole range of industries including building and construction, and rail and transport. The armored mains cable is also supplied for transmission, distribution, and power networks as well as automation and process control systems.
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