![]() SWA (3) – Steel Wire Armour, this is a cable that is surrounded by a layer of armour made up of steel wire, it is generally used where the cable requires a high degree of protection. Each individual conductor is made up of very fine strands of copper to allow the cable to repeatedly flex. ![]() A third un-insulated conductor sits between the two and this is used as the Circuit Protective Conductor or ‘earth’ as it is commonly known.įlex (2) – A flexible cable that has a soft rubber or thermoplastic outer sheath and individually insulated conductors inside it. Inside, it has two single conductors of the same size that are both separately insulated, one is brown in colour denoting its intended use as the line conductor, and the other is blue, denoting its intended use as the neutral conductor. ![]() Twin and Earth (1) – This is the most common cable used in domestic electrical installations, it is a flat grey thermo-plastic sheathed cable. Cable – A cable is made up of one or more conductors and their insulated surrounding ![]()
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