Cable model numbers are codes or numbering systems used to identify the specific specifications, performance, and applications of cables or wires. Different cable model numbers differ significantly in structure, materials, electrical performance, and applicable environments, and are typically represented by a combination of letters and numbers (e.g., YJV, RVVP), covering key information such as conductor material, insulation type, shielding method, and sheath material. Below is a detailed analysis of cable model numbers:
Model Number Composition and Meaning
Conductor Identification: For example, "T" represents copper core (can be omitted), "L" represents aluminum core.
Insulation Material: For example, "V" is polyvinyl chloride (PVC), "Y" is polyethylene (PE).
Sheath/Shielding Layer: For example, "V" is PVC sheath, "P" is shielding layer (e.g., RVVP).
Special Purpose: For example, "K" indicates control cable, "NH" is fire-resistant.
Common Model Examples
Power Cables: YJV (cross-linked polyethylene insulation, PVC sheath), VV (polyvinyl chloride insulation, PVC sheath). Communication Cable: HYA (Copper core, solid polyolefin insulated, aluminum-plastic bonded sheath).
Specialty Cable: DJYPVP (Shielded cable for computers).
Key Selection Parameters:
Conductor cross-sectional area (e.g., 1.5mm², 4mm²) determines current carrying capacity.
Rated voltage (e.g., 0.6/1kV) must match the application scenario.
Environmental adaptability: High temperature resistance, flame retardant rating (e.g., ZC-BV is flame retardant Class C).
Application Scenarios:
Building wiring: BV wire (hard copper core, PVC insulated) for fixed installation.
Industrial equipment: RVVP (Shielded flexible cable) for electromagnetic interference resistance.
Outdoor installation: YJV22 with steel tape armor for mechanical damage protection.
Precautions:
Verify national standards (e.g., GB/T 5023) or industry specifications.
Avoid mixing different models (e.g., power cables cannot replace signal cables). Special models (such as fluoroplastic insulated cables) should be selected for high-temperature and corrosive environments.