... between conductor and earth or metallic screen for which the cable is designed; * U is the rated power frequency voltage ... between conductors for which the cable is designed; * Um is the maximum value of the ... 2.5mm2, 4mm2, 6mm2, 10mm2, 16mm2, 25mm2, 35mm2, 50mm2, 70mm2, 95mm2, 120mm2, 150mm2, 185mm2, 240mm2, 300mm2, 400mm2, 500mm2, 630mm2, 800mm2 xlpe insulated ...