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Steel wire armoured cable, commonly abbreviated as SWA, is a hard-wearing power cable designed for the supply of mains electricity.t is one of a number of armoured electrical cables â which include 11kV Cable and 33kV Cable â and is found in underground systems, power networks and cable ducting.
The armoured (SWA) KNX cable uses the substantial duct grade cable as a base with the addition of 0.9mm solid galvanised steel wires cased in a heavy waterproof PE jacket-making it one of the toughest cables around. For internal installations where the cable may be seen, the white KNX cable is ideal.The cable is exactly the same in construction as the standard green 2 pair cable but has a white LSHF sheath with yellow printing.t has been tested and certified as being suitable for use in KNX systems and bears the KNX logo. Also offered is a duct grade, armoured and white version. The duct grade KNX cable features a tough polyethylene (PE) waterproof jacket over the standard LSHF inner sheath.