Cable Selection for Motor: Important Formulas & Tables
Using the above formulas, we can calculate the required cable size: Calculate the voltage drop: Voltage Drop = 2 × K × I × L × (R / 1000) / A. Calculate the cross-sectional area (A) using the current-carrying capacity formula. Example of DC Motor: Cable Size Calculation for DC Motor Consider a DC motor with a power rating of 3 kW, running ...