How To: Cable Size Calculation

ΔV=2.5×50.94×801000=10.19 Vcap delta cap V equals the fraction with numerator 2.5 cross 50.94 cross 80 and denominator 1000 end-fraction equals 10.19 V (10.19 V is well below the 20 V limit, so 16 mm2m m squared is verified as safe to use).

Rule: Ib≤InRule: cap I sub b is less than or equal to cap I sub n Step 3: Apply Environmental Correction Factors how to cable size calculation

where: A = cross-sectional area of the conductor (mm²) Ib' = corrected load current (A) L = cable length (m) σ = conductivity of the conductor material (e.g., copper: 56, aluminum: 35) ΔV = acceptable voltage drop (V) If your conditions differ, you must calculate the

The current capacity of a cable depends on Derating Factors (Correction Factors). Standard tables give ratings for specific ideal conditions. If your conditions differ, you must calculate the Required Capacity ($I_\textrequired$) before selecting a cable: If your conditions differ