Cable Sizing, Voltage Drop & Short-Circuit

Load current, ampacity check, normal and starting voltage drop, and short-circuit thermal check for LV cables.

Installed capacity Pe (kW)

Demand coeff. Kx

Power factor cosφ

System line voltage Ue (V)

Cable length L (m)

Cross-section s (mm²)

Conductor material

Cable reactance X (Ω/km)

Temperature corr. factor

Group corr. factor

Cable ampacity I_cable (A, after correction)

Enter the tabulated ampacity of the selected cable from the reference data page.

Starting current multiple Kst

Start power factor cosφq

Fault current at cable I"k (kA)

Fault duration t (s)

Constant k

k ≈ 115 (PVC Cu), 143 (XLPE Cu), 76 (PVC Al).