... SWA Cable?Aluminium Wire Armour (AWA) is used in single core cable because it is non-magnetic. When an electric current ... diameter 25mm² and above: 8 x overall diameterCore Identification:1 Core: Brown or Blue2 Cores: Brown, Blue 3 Cores: Brown, Black ... , Grey 5 Cores: Green/Yellow, Blue, Brown, Black, Grey Alternative core identification: White Cores with Black numbers BS6724 SWA CABLE