Polyethylene Insulated Jelly Filled Moisture Barrier Sheathed Telephone Cables
CCP-JF-LAP
- Conductor: Solid annealed copper wire in size 0.4mm to 0.9mm.
- Insulation: High Density Polyethylene.
- Quadding: Four insulated conductors are twisted into a star quad.
- Cable Formation:
(1) 200 pair and less: Five quads shall be stranded into a 10 pair unit, and binding with color tape. The units are stranded into a compact and circular cable core according to specification.
(2) 300 pair and more: Five 10 pair unit shall be stranded into a 50 pair super-unit, and binding with color tape. The super-units are stranded into a compact and circular cable core according to specification. - Core Wrapping: A Non-hygroscopic tape.
- Filling Compound: Water resistant filling compound.
- LAP Sheath: The copolymer coated aluminum screen is longitudinally folded around the cable core and sealed at the overlap during extrusion of polyethylene outer sheath.
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Electrical Characteristics at 20℃ |
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Item\Conductor Diameter(mm) |
0.4 |
0.5 |
0.65 |
0.9 |
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Conductor Resistance(Ω/km) |
Normal value |
139.0 |
88.7 |
52.5 |
27.4 |
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Max value |
147.5 |
93.5 |
56.5 |
29.0 |
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Min. Insulation Resistance |
5000 MΩ/km |
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Mutual Capacitance |
Average value |
≦65nF/km |
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Capacitance Unbalance(1KHz) |
Average value |
100 pF |
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Max value |
800 pF |
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Dielectric Strength(V/min) |
Conductor-earth |
DC 500/1 or AC 350/1 |
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Aluminum-earth |
AC2000 or DC 3000 (in water for 1 hour) |
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