One or more of the following methods can be used to identify equipment 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 terminal or specific wire end.

3.2 Use the marking system of related products to determine and identify the color markings of the equipment terminal and specific wire ends.

3.3 Use the graphic symbols specified in GB5465. If auxiliary symbols are needed, they should be consistent with the graphics in GB4728.

3.4 Use the alphanumeric symbols specified in Chapter 5 of this standard.