Structuring principles for technical products and technical product documentation - Part 2: Letter codes - Main classes and subclasses of objects according to their purpose or task— 59 стр.
Identification of equipment terminals and of terminations of certain designated conductors, including general rules of an alphanumeric system (IEC 60445:1988); german version EN 60445:1990
Preparation of documents used in electrotechnology - Part 1: General requirements; Amendment A2 (IEC 61082-1:1991/A2:1996); German version EN 61082-1:1993/A2:1996— 11 стр.
Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 1: Basic rules (IEC 61346-1:1996); German version EN 61346-1:1996— 37 стр.
Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes (IEC 61346-2:2000); German version EN 61346-2:2000— 20 стр.