The composition of power cables should be: consisting of a conductor core, insulation layer, and sheath. Detailed classification (high voltage, low voltage is not mentioned): conductor core, inner semiconducting layer, insulation layer, outer semiconducting layer, copper shield, filler, inner lining, double steel strip protective layer, and outer sheath.
Flame-retardant/Fire-resistant electrical cables. The flame-retardant grade is indicated by adding "A", "B", or "C" after the letter "Z", such as "ZA", "ZB", "ZC". When "ZR" is used, it is generally considered to be "C" grade flame-retardant. The indication for flame-retardant fire-resistant grade is by inserting "A", "B", or "C" into the middle of "ZN", such as "ZAN", "ZBN", "ZCN". When "NH" is used, it is generally considered to be "ZCN". For example:
Model Name Equivalent
ZC-YJV Copper Core Cross-Linked Polyethylene Insulated Polyvinyl Chloride Sheathed Flame Retardant C-Level Power Cable, ZR-YJV
ZCN-YJV Copper Core Cross-Linked Polyethylene Insulated Polyvinyl Chloride Sheathed Flame Retardant C-Class Fire-Resistant Power Cable NH-YJV
0.6/1KV Single-core Cross-linked Polyethylene Insulated PVC Sheathed Power Cable
1. Product Application: Used for electric power lines, for the transmission and distribution of electrical energy.
Product Standard: GB12706
3. Product Usage Characteristics: (1) No preheating is required when laying the cable under environmental temperatures not below 0°C. The laying drop of the cable is unrestricted. (2) The long-term allowable operating temperature of the conductor core must not exceed the following specifications: cables with an outer sheath of polyvinyl chloride jacket are 90°C; cables with an outer sheath of polyethylene jacket are 80°C. (3) The temperature must not exceed 250°C during a short-circuit of the conductor core (long-lasting for 5 seconds). (4) The minimum bending radius for cable laying is as follows: Single-core cable: 20(d+D)±5%; Three-core cable: 15(d+D)±5%. Where: D is the actual outer diameter of the cable, d is the actual outer diameter of the conductor.
4. Product Type, Name, and Application Scope
Type Name Usage Scope
Copper Core, Aluminum Core
YJV, YJLV Cross-linked Polyethylene Insulated Polyvinyl Chloride Sheathed Power Cables, Fixedly Installed in Air, Indoor, Cable Trench, or Underground
YJY JYLY Cross-linked Polyethylene Insulated Polyethylene Sheathed Power Cable, Fixed in Indoor, Cable Trench, or Underground
YJV22 YJLV22 Cross-linked Polyethylene Insulated Steel Tape Armored PVC Sheathed Power Cables, Fixedly Installed in Locations Subject to External Pressure
YJV23, YJLV23 Cross-linked Polyethylene Insulated Steel Tape Armored Polyethylene Sheathed Power Cable, Fixed in places frequently subjected to external forces
YJV32, YJLV32 Cross-linked Polyethylene Insulated Fine Steel Wire Armored PVC Sheathed Power Cables, Fixed in Locations Subject to Tensile Force Requirements
YJV33 YJLV33 Cross-linked Polyethylene Insulated Fine Steel Wire Armored Polyethylene Sheathed Power Cables, Fixedly Installed in Locations Requiring Tensile Strength Resistance
YJV42 JYLV42 Cross-linked Polyethylene Insulated, Steel Wire Armored, PVC Sheathed Power Cables for Fixed Installation Underwater, in Vertical Shafts, or in Areas Subject to Tensile Forces
YJV43 YJLV43 Cross-linked Polyethylene Insulated Coated Steel Wire Armored Polyethylene Sheathed Power Cable, designed for fixed installations in locations requiring high tensile strength.

Electrical cables, to ensure the normal operation of the cables and motors, the following three principles should be adhered to when selecting the cable cross-section:
1. During normal operation, the actual temperature rise of the cable should not exceed the maximum temperature rise allowed by the insulation.
2. Select based on the allowable voltage drop during the operation of the cable circuit.
3. The selection of cable cross-section must meet the requirements for mechanical strength.

Cable power, divided by voltage grades:
1. Low-voltage cables: Suitable for fixed installation on AC 50Hz transmission and distribution lines with rated voltages of 3kV and below for power transmission.
2. Medium and Low Voltage Cables (generally 35KV and below): Polyvinyl Chloride (PVC) insulated cables, Polyethylene (PE) insulated cables, Cross-Linked Polyethylene (XLPE) insulated cables, etc.
3. High-voltage cables (typically 110KV and above): Polyethylene cables and cross-linked polyethylene insulated cables, etc.
4. Pressurized Cables: (275～800KV)
5. Ultra-high-voltage cables: (1000KV and above).
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