Automotive terminalWhat is the standard of identification? What are the specifications? The editor of Keweite will give you a detailed explanation below.

Identification standard

This standard is equivalent to the international standard IEC455 (1988) "General Rules for the Identification and Application of Alphanumeric System of Equipment Terminals and Specific Wire Ends."

Scope of application

This standard specifies various methods for identifying electrical equipment (hereinafter referred to as equipment) wiring terminals, and formulates general rules for identifying equipment wiring terminals and specific wire ends with an alphanumeric system.

This standard applies to equipment (such as resistors, fuses, relays, contactors, transformers, rotating electrical machines, etc.) and the identification markings of the terminals of the combination of these equipment, as well as the identification of specific wire ends.

When necessary, the detailed application of these general rules to certain products and the necessary auxiliary identification methods can be given in the relevant standards.

Reference Standard

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 marking of the equipment terminal and specific wire end.

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.

application

Colors, graphic symbols or alphanumeric symbols should be marked at or near the corresponding line ends.

When two or more identification methods are used and confusion may occur, the relationship between the two identification methods must be explained in the relevant documents.

System General Rules

5.1 Basic principles

5.1.1 The alphanumeric system consists of uppercase Latin letters and Arabic numerals.

5.1.2 The letters for marking DC components are selected from the first half of the alphabet, from A to M, and the letters for marking AC components are selected from the second half of the alphabet, from N to Z.

The letters "I" and "O" cannot be used, and the symbols "+" and "-" can be used.

5.1.3 When there is no confusion, some parts of the complete alphanumeric symbols specified in Article 5.2 are allowed to be omitted.

5.2 Marking principle

Terminal marking is based on the following principles:

5.2.1 The two terminals of a single component are distinguished by two consecutive numbers. The odd number should be smaller than the even number, such as 1 and 2.

5.2.2 The middle terminals of a single component are distinguished by numbers, and it is best to use numbers in natural increasing sequence. For example: 3, 4, 5, etc. The number of the middle terminals should be larger than those on the two sides, and should be marked from the terminal close to the smaller number. For example, the middle terminals of a component with terminals 1 and 2 on both sides should be marked with numbers 3, 4, and 5.

Two side terminals and two middle terminals

5.2.3 If several similar components are combined into a group, the terminals of each component can be connected to the following method marks:

a. The numbers specified in 5.2.1 and 5.2.2 are prefixed with letters to distinguish the terminals on both sides and the terminals in the middle, for example:

Use U, V, W to mark each phase terminal of the equipment in the three-phase AC system;

b. When it is not necessary or impossible to identify the phase, prefix the number specified in 5.2.1 and 5.2.2 to distinguish the terminals on both sides and the terminals in the middle. To avoid confusion, add a dot between these numbers, for example: the terminals of one component are marked with 1.1 and 1.2, and the terminals of another component are marked with 2.1 and 2.2;

c. The two terminals of each element are distinguished by different consecutive numbers, and the odd number of the element should be smaller than the even number.

5.4 Identification of specific wire ends

The identification of the alphanumeric characters of the specific wire ends shall comply with the requirements in Table 1.

Through the above explanation, I believe that everyone has a deeper understanding of the identification standard of the terminal. If you are interested in car terminal blocks, you can directly communicate with Kevet's online customer service. Welcome customers to come to consult and purchase!