Cable Derating Factor !!hot!! (Browser Direct)

Several environmental and installation variables can reduce a cable's ability to shed heat, requiring a lower derating factor (typically a value between 0 and 1).

(I_base = 210A)

A (also known as a correction factor) is a multiplier used to reduce the standard current-carrying capacity (ampacity) of a cable to account for real-world environmental and installation conditions that hinder heat dissipation . cable derating factor

For buried cables, the ability of the soil to conduct heat away varies. Dry, sandy soil insulates; moist, clay soil conducts heat well. sandy soil insulates

Higher ambient temperature reduces heat dissipation. cable derating factor