1. Theme and Scope of Application

This standard specifies various methods for identifying terminal blocks of electrical equipment (hereinafter referred to as equipment), and formulates general rules for identifying terminal blocks of equipment and specific wire terminals with alphanumeric system. This standard applies to the identification marking of equipment (such as resistors, fuses, relays, contactors, transformers, rotating motors, etc.) and the wiring terminals of these equipment combinations, as well as to the identification of specific wire terminals. If necessary, the detailed application of these general rules and necessary auxiliary identification methods for certain products can be provided in relevant standards.

2 Referenced standards

GB 4728 Graphical Symbols for Electrical Diagrams GB5465 Graphical Symbols for Electrical Equipment

3 Identification methods

One or more of the following methods can be used to identify equipment wiring terminals and specific wire terminals. 3.1 The Tag system of relevant products shall be used to determine and identify the actual or relative position of equipment terminal blocks or specific wire terminals. 3.2 Use the Tag system of related products to determine and identify the color marking of equipment terminal blocks and specific wire terminals. 3.3 Use the graphical symbols specified in GB5465. If auxiliary symbols are required, they should be consistent with the graphics in GB4728. 3.4 Use the alphanumeric symbols specified in Chapter 5 of this standard.