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telephone cable
1. Conductor: Adopt soft round copper wire as conductors, whose diameter includes 0.5, 0.6, 0.8mm;
2. Insulation: adopt one of flame retardant polyethylene, PVC and polyethylene according to different mole;
3. Line pairs: every two insulation conductor strands into pair according to the stated chromatogram;
4. Sheath : the technical spec of PVC sheath material is up to the standard of GB8815;
5. Indoor telephone cable and outdoor telephone cable, Type for HYV,HYY,HYYC;
Mechanical, physical, electrical performances of polypropylene insulated, PVC sheath round telephone wire:
Ltem | Performance index |
Tensile strength before test of insulation aging | ≥12.5 |
Tensile strength after test of insulation aging | ≥10 |
Elongation rate at break before test of insulation aging | ≥125% |
Elongation rate at break after test of insulation aging | ≥100% |
Insulation removability | Do not hurt insulation and conductor |
Cold bend of insulation | Not crack |
Ltem | Performance index |
Heat impulse on insulation | Not crack |
Insulation dielectric strength | Not breakdown at 1500V, 1min |
Test of insulation resistance | 20°C≤200MΩ, km/70°C≤0.3MΩ,km |
Broken, mixture wire of conductor(continuity) | No breakdown and mixture |
Voltage withstand of final wire | Not breakdown at 2000V, 1min |
Friction resistance of logo | Friction resistance, legible |
telephone cable