A derating factor can be calculated with the Cable Sizing command considering the installation and environmental conditions of a cable.

• Select the method “International Standards” and choose a standard.
• Select the mode “Recommendation”.
• Activate the option “Calculate derating factor only”.

With these settings the derating factor of all selected cables can be calculated as shown in the attached example. The definition of the installation and environmental conditions can be done in the cable element (ElmLne) as shown in the attached pdf-document.