Calculate Minimum Required Capacity ($I_t$): $$I_t = \frac260.94 \times 0.65 = \frac260.611 \approx 42.5 \text Amps$$
Let's say we need to calculate the cable size for a 3-phase, 400V, 50Hz load with a current of 100A, and a length of 50m. calculating cable size