Steel wire defensively covered cable, usually curtailed as SWA, is a hard-wearing force cable intended for the supply of mains power. It is one of various protected electrical links – which incorporate 11 kV Cable and 33 kV Cable – and is found in underground frameworks, control systems and cable ducting.

The typical construction of an SWA Cable can be broken down as follows:

Conductor: consists of plain stranded copper (cables are classified to indicate the degree of flexibility. Class 2 refers to rigid stranded copper conductors as stipulated by British Standard )

Insulation:Cross-connected polyethylene (XLPE) is utilized in various power cables since it has great water obstruction and phenomenal electrical properties. Protection in cables guarantees that conveyors and other metal substances don’t come into contact with one another.

Bedding: Polyvinyl chloride (PVC) bedding is utilized to give a defensive limit among inward and external layers of the link.

Armour: Steel wire covering gives mechanical security, which implies the link can withstand higher anxieties, be covered specifically and utilized in outside or underground activities. The armouring is ordinarily associated with earth and can likewise be utilized as the circuit defensive conveyor (“earth wire”) for the hardware provided by link.

Sheath: A dark PVC sheath holds all segments of the link together and gives extra insurance from outer burdens. SWA Cable can be alluded to all the more by and large as Mains Cable, Armored Cable, Power Cable and Booklet Armored Cable. The name Power Cable, in any case, applies to an extensive variety of links including 6381Y, NYCY, NYY-J and 6491X Cable.


Steel Wire Armor is just utilized on multicore renditions of the link. A multicore link, as the name proposes, is one where there are various diverse centers. At the point when SWA Cable has just a single center, aluminum wire armour (AWA) is utilized rather than steel wire. This is on account of the aluminum is non-attractive. An attractive field is delivered by the current in a solitary center link. This would initiate an electric flow in the steel wire, which could cause overheating.


The use of the fortification as the techniques for offering earthing to the apparatus given by the connection (a limit really known as the circuit protective conductor or CPC) includes chitchat inside the electrical foundation industry. It is a portion of the time the case that an additional middle inside the connection is shown as the CPC (for instance, as opposed to using a two focus interface for line and impartial and the armouring as the CPC, a three focus connect is used) or an outside earth wire is continued running near to the connection to fill in as the CPC. Fundamental concerns are the relative conductivity of the armouring appeared differently in relation to the focuses (which diminishes as the connection measure additions) and constancy issues. Progressing articles by real sources have dismembered the preparation in detail and contemplated that, for the bigger piece of conditions, the armouring is adequate to fill in as the CPC under Australia wiring bearings.