This part of IEC 1629 contains the definitions, designations and general requirements of aramid pressboard for electrical purposes. Materials which conform to this specification meet established levels of performance. However, the selection of a material for a specific application should be based on the actual requirements necessary for the adequate performance in that application and not based on this specification alone. While the primary use of these materials is an electrical insulation, there is no intent to discourage their use in other applications for which their properties may make them suitable.