Cable Derating Factors _top_ ✦

Cables have a base current-carrying capacity (often denoted as $I_0$ or $I_z$) determined by the maximum operating temperature of the insulation (e.g., 70°C for PVC, 90°C for XLPE).

$$ I_eff = I_nom \times k_temp \times k_group \times k_soil \times k_depth \times k_altitude \times k_harmonics \times ... $$ cable derating factors