Conductor: Annealed copper or tinned copper. Cross-sectional area: 0.5mm² and 0.75mm² multi-stranded (Class 5), 0.5 mm², 1.0 mm² solid (Class 1), 1.5mm² or 2.5mm², multi-stranded (Class 2) in accordance with BS 6360. Insulation: XLPE. Twisted wire pairs