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The name of mine cable and the principle of cable naming
Mine cables, short for fire-retardant cables used in coal mines, are specifically designed to meet strict safety requirements in underground mining environments. According to the industry standard "Fire-Retardant Cable for Coal Mines" issued by the former State Coal Industry Bureau, the naming convention of these cables is structured in a detailed and informative way. Understanding the model designation helps users identify the cable’s purpose, construction, and technical specifications.
The name of a mine cable consists of eight key components:
1. **Series Code (M):** The first character is "M," which stands for "mei" (coal) in Chinese pinyin, indicating that the cable is intended for use in coal mines.
2. **Application Character Code:** This part describes the specific usage or environment of the cable. Common codes include:
- **C:** For coal mining machines
- **D:** For low-temperature environments
- **M:** For cap lamps
- **Y:** For mobile coal mining equipment
- **Z:** For electric drills
3. **Structural Feature Code:** This section indicates the cable's internal structure or special features. Some common codes are:
- **B:** Braided reinforcement
- **J:** With monitoring core
- **P:** Non-metallic shielding
- **PT:** Metallic shielding
- **Q:** Lightweight design
4. **Material Feature Code:** This part specifies the type of material used for insulation or sheathing. The letter **E** denotes the use of elastomer materials, while this code may be omitted if both rubber and rubber-like materials are used.
5. **Rated Voltage (U₀/U):** This shows the cable’s voltage rating, expressed in kilovolts (kV). It is essential for determining the cable’s suitability for different electrical systems.
6. **Number of Power Conductors * Cross-sectional Area:** This part indicates how many power cores the cable has and their respective cross-sectional area, usually measured in square millimeters (mm²), connected by a multiplication sign (×).
7. **Number of Ground Conductors * Cross-sectional Area:** Similar to the previous part, this specifies the number and size of grounding conductors in the cable.
8. **Number of Auxiliary Conductors * Cross-sectional Area:** This final segment identifies any additional auxiliary wires, such as signal or control lines, along with their sizes.
By following this standardized naming system, engineers, technicians, and procurement teams can quickly determine the appropriate cable for a given application in a coal mine. This clarity not only ensures proper installation but also enhances safety and operational efficiency in hazardous underground environments.