2002NF C26-303:2002 Electrical insulating materials - Thermal endurance properties - Part 3 : instructions for calculating thermal endurance characteristics.
1995NF C26-303-2:1995 Guide for the determination of thermal endurance properties of electrical insulating materials. Part 3 : instructions for calculating thermal endurance characteristics. Section 2 : calculations for incomplete data : proof test results up to and including
1991NF C26-303-1:1991 Determination of thermal endurance properties of electrical insulating materials. Instruction for calculating thermal endurance characteristics. Section 1 : calculations using mean values of normally distributed complete data.