Electrical / Calculator

Cable Ampacity Correction

Apply temperature and grouping factors to a manufacturer’s base current rating.

Calculator

Cable Ampacity Correction

Change the inputs to match your equipment. Results update automatically.

Calculated result -

Formula

Iz = Iz0 x k_temperature x k_grouping

Worked example

80 A × 0.94 × 0.80 = 60.16 A after the entered correction factors.

Scope and interpretation

The base rating and correction factors must come from compatible installation conditions. This calculator does not supply a universal cable rating.