Coding on the body of a wire and cable is a method used to identify the characteristics and performance of the cable. A cable is a conductor used to transmit electrical energy or signals, which is composed of one or more conductors, insulation layers, shielding layers, sheathing, etc. Different cable types and uses require different structures and materials, so the coding of cables also has different rules and meanings. This article will introduce the basic composition and interpretation of cable coding, as well as some common cable models and standards.

Basic components of cable coding

The cable code usually consists of seven parts, which are category, purpose code, conductor material code, insulation material code, metal shield code, metal sheath code, non-metal sheath code and special structure or performance code. Each part is represented by one or more uppercase letters or numbers, each with a specific meaning. The content and examples of each of the seven sections are described below.

1. Category, use code: This part is used to indicate the category and use of the cable, for example, A represents the installation line, B represents the insulated line, K represents the control cable, Y represents the mobile cable and so on. Different categories and uses correspond to different structure and performance requirements. For example, the installation cable is generally a single core or multi-core insulated conductor, without sheath or armor layer, suitable for fixed laying; Mobile cables are generally multi-core insulated conductors, with soft sheaths or armor layers, suitable for mobile use.

2. Conductor material code: This part is used to indicate the material of the conductor, for example, L means aluminum or aluminum alloy, V means PVC insulation and so on. Different materials correspond to different electrical conductivity and prices. For example, copper conductors have higher electrical conductivity, but are also more expensive; Aluminum alloy conductors have lower electrical conductivity, but are also less expensive.

3. Insulation material code: This part is used to represent the insulating layer of the material, for example, Y means crosslinked polyethylene, V means polyvinyl chloride and so on. Different materials correspond to different insulation properties and temperature resistance. For example, crosslinked polyethylene has high insulation properties and temperature resistance, and can withstand temperatures of up to 90 ° C or more; PVC has low insulation properties and temperature resistance, and can only withstand temperatures below 70 ° C.

4. Metal shield code: This part is used to indicate the type of metal shield, for example, S means copper shield, D means steel shield, etc. Metal shielding is a measure used to prevent external interference or reduce internal leakage. Different types correspond to different impedances and strengths. For example, copper strip shielding has lower impedance and higher strength; Steel strip shielding has higher impedance and lower strength.

5. Metal sheath code: This part is used to indicate the type of metal sheath, for example, L stands for aluminum or aluminum alloy with sheath. Metal sheathing is a measure used to protect cables from mechanical damage or chemical corrosion. Different types correspond to different sealing and corrosion resistance. For example, aluminum or aluminum alloy tape sheathing has better sealing and corrosion resistance.

6. Non-metallic sheath code: This part is used to indicate the type of non-metallic sheath, for example, V means polyvinyl chloride sheath, Z means flame retardant polyvinyl chloride sheath, etc. Non-metal sheath is a measure used to protect the cable from the external environment. Different types correspond to different weather resistance and flame retardancy. For example, polyvinyl chloride sheath has better weather resistance and poor flame retardant; Flame retardant polyvinyl chloride sheath has poor weather resistance and better flame retardancy.

7. Special structure or performance code: This part is used to indicate the special structure or performance of the cable, for example, 2 means that the armor layer is non-magnetic metal with interlocking armor, 3 means three-core cable and so on. Special structure or performance is a measure used to meet specific needs or improve the performance of a cable. For example, non-magnetic metal with interlocking armor can improve the flexibility and strength of the cable; The three-core cable can reduce the size and weight of the cable.

Interpretation method of cable coding:

According to the order and meaning of the above seven parts, the information represented by each letter or number is analyzed in turn. For example, the code YJV22-0.6/1 3x95+1x50 GB/T 12706.1-2008 can be interpreted as:

- YJV22 indicates a cross-linked polyethylene insulated polyvinyl chloride sheathed steel tape armored power cable

-0.6/1 indicates that the rated voltage is 0.6/1 kV

-3x95 +1x50 means three cores plus one core, the nominal cross-sectional area of the main core is 95 square millimeters, and the nominal cross-sectional area of the neutral line is 50 square millimeters

- GB/T 12706.1-2008 Indicates the standard number of the execution

In this way, we can understand the basic structure, materials, specifications, standards and other information of this cable.

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