Where: A = cross-sectional area of the cable (mm²) I = total current (A) L = cable length (m) ρ = resistivity of the material (Ωm) V = voltage drop (V) η = efficiency factor (usually 0.8-0.9)
If the voltage drop is too high, you must increase the cable size by one step and recalculate. calculation of cable size formula
$$Z_s = Z_e + (R_1 + R_2)$$
The general formula for calculating the minimum required cross-sectional area ($A$) based on current is derived from the relationship between current, resistance, and heat dissipation. However, in practical engineering, we rarely calculate the area from physics first principles. Instead, we calculate the and select a cable from standard manufacturer tables. Where: A = cross-sectional area of the cable
The goal of cable sizing is to determine the minimum cross-sectional area of a conductor that can carry the design current safely under specific installation conditions without exceeding its temperature rating. Instead, we calculate the and select a cable