Specification for plastic films for electrical purposes - Part 3: Specifications for individual materials; Sheet 2: Requirements for balanced biaxially oriented polyethylene terephthalate (PET) films used for electrical insulation (IEC 60674-3-2:1992); German version EN 60674-3-2:1998
Insulating materials - Industrial, rigid, moulded, laminated tubes and rods of rectangular and hexagonal cross-section based on thermosetting resins for electrical purposes - Part 1: Definitions, designations and general requirements (IEC 62011-1:2002); German version EN 62011-1:2002