Formula For Cable Size Calculation [verified] 🆓

$$V_d = \frac\sqrt3 \times I \times L \times \rhoA \quad \text(For Three Phase)$$

Ib=P3×V×PFcap I sub b equals the fraction with numerator cap P and denominator the square root of 3 end-root cross cap V cross cap P cap F end-fraction (Where = Power in Watts, = Voltage, and PFcap P cap F = Power Factor, usually 0.8 to 1.0) 3. Step 2: Select the Protective Device ( Incap I sub n formula for cable size calculation