Voltage | Conductor Spacing Cable to Earth | Conductor Spacing Cable to Cable | Phase Conductor Diameter Range | Messenger Cable Diameter Range | Creepage Distance (minimum) | Basic Insulation Level | Wet Voltage Withstand | Wet Flashover Voltage | UV aging (hours) |
15kV | 220mm | 203mm | 11mm-48mm | 6.35mm-19.05mm | 290mm | 110kV | 34kV | 2000 | |
15kV | 165mm | 175mm | 11mm-30mm | 6.35mm-19.05mm | 280mm | 110kV | 34kV | 2000 | |
25kV | 270mm | 270mm | 11mm-50mm | 6mm-19mm | 522mm | 125kV | 2000 | ||
35kV | 331mm | 335mm | 11mm-40mm | 6mm-19mm | 715mm | 180kV | 70kV | 80kV | 2000 |
35kV | 245mm | 272mm | 10mm-38mm | 6mm-19mm | 450mm | 150kV | 50kV | 60kV | 2000 |