21. Guidelines for application of analytical test methods for thermal endurance testing of electrical insulating materials 22. Guidelines for application of analytical test methods for thermal endurance testing of electrical insulating materials 23. Electrical insulating materials - thermal endurance properties - instructions for calculating thermal endurance characteristics 24. Determination of thermal endurance properties of electrical insulating materials . ageing ovens . section 1 : single - chamber ovens 25. Electrical insulating materials - properties of thermal endurance - part 1 : ageing procedures and evaluation of test results 26. Electrical insulating materials - properties of thermal endurance - part 1 : ageing procedures and evaluation of test results 27. Electrical insulating materials - properties of thermal endurance - part 1 : ageing procedures and evaluation of test results 28. Aerospace series - cables , electrical , aircraft use ; test methods - part 410 : thermal endurance ; german version en 3475 - 410 : 2002 29. Electrical insulating materials - thermal endurance properties - part 3 : instructions for calculating thermal endurance characteristics 30. 10 . 01 test method for thermal endurance of flexible sheet materials used for electrical insulation by the curved electrode method