Calculation Of Cable Size Formula Exclusive

The formula to find the Tabulated Current ($I_t$) you need to look for is:

$$I_b = \fracPV \times \textPF$$

$$Z_s = Z_e + (R_1 + R_2)$$

Most guides present cable sizing as a neat two-step formula: calculation of cable size formula

If the table says a 16mm² copper cable is rated for 80A, that is your selection. The formula to find the Tabulated Current ($I_t$)