This International Standard provides the test methods for combined flexible materials forelectrical insulation. Some properties and relevant test methods, according the perfomancerequirements of IEC 60626-3 were confirmed, Other test methods are described as asupplement of guidance for further specification that could be agreed between customerand supplier to meet specific needs of the end use.Materials which conform to this specification meet established levels of performance.However, the selection of material by a user for a specific application should be based on theactual requirements necessary for adequate performance in that application and not based