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This standard is equivalent to the international standard IEC 455 (1988) "General Rules for the Identification and Application of Alphanumeric Systems for Equipment Terminals and Specific Wire Ends".
1 Subject content and scope of application
This standard specifies various methods for identifying electrical equipment (hereinafter referred to as equipment) terminals, and has established a general rule for identifying equipment terminals and specific conductor ends by an alphanumeric system. This standard applies to the identification of the terminals of devices (such as resistors, fuses, relays, contactors, transformers, rotating electrical machines, etc.) and combinations of these devices, as well as for the identification of specific wire ends. Where necessary, the detailed application of these general rules for certain products and the necessary auxiliary identification methods can be given in the relevant standards.
2 Reference standard
GB 4728 Graphical symbols for electrical diagrams GB5465 Graphical symbols for electrical equipment
3 Identification method
One or more of the following methods can be used to identify device terminals and specific wire ends. 3.1 Use the marking system of the relevant product to determine and identify the actual or relative position of the equipment terminals or specific wire ends. 3.2 Use the marking system of the relevant product to determine and identify the color markings of the device terminals and the specific wire ends. 3.3 Use the graphic symbols specified in GB5465. If you need to use auxiliary symbols, it should be consistent with the graphics in GB4728. 3.4 Use the alphanumeric symbols specified in Chapter 5 of this standard.
