... (PVC)3). The rated voltages U0/U(Um) of the cables considered in this standard are as follows: U0/U(Um ... /20kV, 18/30kV, 21/35kV, 26/35kV In the voltage designation of cables U0/U(Um): * U0 is the rated power frequency ... , 185mm2, 240mm2, 300mm2, 400mm2, 500mm2, 630mm2, 800mm2 xlpe insulated power cables