Industrial Armoured Cables UK: SWA Cable Types, Specifications & Industrial Applications Industrial armoured cables UK experts use is one of the most critical components in any electrical system, especially when powering critical infrastructure in factories, utilities, and construction sites. These cables are tough, reliable, and able to withstand the harshest conditions, and they are a vital component of modern industrial power distribution. When installing new cables or replacing older ones, it is important to know about the various types, standards, and considerations for selecting the appropriate industrial armoured cables to guarantee safety, compliance, and cost-effectiveness. Everything from how cables are constructed, to what they are typically used for, to BS 5467 armoured cable standards, and installation advice for different sectors are covered in this guide. What Are Industrial Armoured Cables? Industrial armoured cables are robust electrical cables that are reinforced with a protective layer of metallic armour (usually steel wire), which helps to resist any mechanical damage, crushing, impact or harsh environmental conditions to which the conductors may be exposed. They can be installed in exposed areas, in the ground, through cable trays and in areas where physical protection is essential in aggressive industrial environments, unlike standard unarmoured cables. The metallic armour layer also offers an important earthing path, thus adding another layer of electrical safety to the installation. How Armoured Cables Work Cable Construction Explained A standard armoured power cable UK installation features cables constructed in concentric layers with each one having its own purpose: Conductors — The inside layer that conducts an electrical current. Conductors are typically stranded copper (or aluminium in certain designs) to offer flexibility while maintaining its conductivity. XLPE Insulation — XLPE insulated armoured cables UK are the standard of the industry due to the better thermal characteristics of XLPE insulation, its resistance to moisture and chemicals, and its ability to withstand higher operating temperatures than PVC insulated cables. Bedding Layer — A PVC layer to bedding between the insulated conductors and the armour, which protects the insulation from the mechanical stresses in the armour wires. Steel Wire Armour (SWA) — The bedding is helically wrapped in steel wires coated with a layer of zinc to provide a strong mechanical barrier. It is this which is responsible for the name SWA cable UK and the most prominent feature of the product. Outer Sheath — Overall mechanical durability is provided by the Outer Sheath which is a PVC (or LSZH) outer sheath to protect the armour from corrosion and environmental exposure. Role of Steel Wire Armour The difference between the industrial armoured cable UK layer and other lighter cables is the steel wire armoured cable UK layer. It covers the cable from: The physical impact and crushing forces. Rodent attack Digging through the roof, walls or foundations of the house or garage In addition to mechanical stresses, during installation, through conduits or through trays, etc. It is also a combined protective conductor (CP) and earth continuity conductor (EC) when properly connected to the appropriate cable glands. Mechanical Protection Benefits These cables provide mechanical protection against damage and can be constructed to be installed in conditions that would cause the failure of unarmoured cables over a short period, such as when installed in soil, exposed raceways in the outdoors, or where installed in machinery-intensive manufacturing areas. Main Types of Industrial Armoured Cables Steel Wire Armoured (SWA) Cables SWA cable UK is the mainstay of industrial electrical installations. The product is the "must have" for multicore power distribution, sub-main power distribution and above ground power distribution. Steel wire armoured cable UK is manufactured to meet BS 5467 (XLPE insulated) or BS 6724 (LSZH sheathed) and will come in 2, 3, 4 and 5 core, voltages up to 600/1000V. Aluminium Wire Armoured (AWA) Cables If single-core cables are needed (such as high current power distribution) then Aluminium Wire Armoured (AWA) cable is used. If steel armour was to be used on a single core cable, the eddy current losses would be unacceptable, which is why aluminium wire is being used, although it will still provide mechanical protection. Armoured Control Cables Armoured control cables UK are multicore cables specifically designed for instrument and control circuits. They are normally sold in smaller sizes from 0.5mm² to 2.5mm2 and the cores in them are high. These are widely employed in manufacturing and utilities in process control panels, motor control centers and PLC wiring. Armoured Instrumentation Cables There are also armoured construction and whole cables or overall screening for protection of low-level signals from electromagnetic interfere…