Submersible pumpset cable selection chart for 415V Three Phase 50 Hz. APPLICATIONS:4 Submersible pump, 6 Submersible pump. 1. HP 7.5D and above are STARDELTA motors.2. For STAR DELTA Starting reduce current by13 for selecting suitable cable Example : For a 20 HP motor at 350 volts and 90 metres actual cablelength. Calculated length = (415+350) x 90 = 107m. The size of the2 cable to be selected for 107m from the chart is 6mm