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| Telphone Cables |
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| Air Core Aerial Cables |
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 Application： |
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| Designed to use in outskirt of the cities and in rural areas. Cables having 0.4 and 0.5 mm conductor diameter are used for short distance distribution networks and cables having 0.6 and 0.9 mm conductor diameter are used for long distance networks. |
| Construction： |
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Conductor
Solid annealed copper having the diameter of 0.4, 0.5, 0.6 and 0.9 mm.
Insulation
Dual insulation of cellular polyethylene covered with a solid skin layer of medium or high-density polyethylene compound (BS 6234)
Cable Assembly
Quads, each having special lay length to minimize crosstalk and capacitance unbalance, are assembled into 10 pair, 50 pair or 100 pair units.
Core Covering
A non-hygroscopic dielectric plastic tape having suitable overlap is applied longitudinally or helically over cable core.
Screen (Shield)
A flat aluminium foil coated with copolymer on both sides is applied longitudinally over the core covering as screen.
Outer Jacket (Sheath)
Black linear-low density or medium-density polyethylene compound is extruded over the screen and Messenger together to form figure 8.
|
Conductor Diameter |
Number
of
Pairs |
Cable Diameter |
Diameter
Over
Messenger |
Approximate
Net
Weight |
Drum Length |
(mm) |
(mm) |
(mm) |
(kg/km) |
(m) |
10 |
8.0 |
19.5 |
136 |
2000 |
20 |
10.1 |
21.6 |
176 |
2000 |
30 |
11.0 |
22.5 |
209 |
2000 |
0.4 |
50 |
12.7 |
24.7 |
297 |
1000 |
100 |
16.3 |
29.3 |
481 |
1000 |
150 |
19.9 |
33.4 |
671 |
500 |
200 |
21.7 |
38.7 |
884 |
500 |
10 |
8.8 |
20.8 |
178 |
2000 |
20 |
11.3 |
23.3 |
235 |
2000 |
30 |
12.4 |
24.4 |
283 |
2000 |
0.5 |
50 |
14.5 |
27.0 |
404 |
1000 |
100 |
18.7 |
31.7 |
667 |
500 |
150 |
23.2 |
40.2 |
980 |
500 |
200 |
25.4 |
42.9 |
1197 |
500 |
10 |
9.8 |
21.8 |
204 |
2000 |
20 |
12.9 |
24.9 |
282 |
1200 |
30 |
14.2 |
26.7 |
375 |
1200 |
0.6 |
50 |
16.7 |
30.2 |
540 |
1200 |
100 |
22.1 |
39.1 |
943 |
1200 |
150 |
27.5 |
45.0 |
1294 |
800 |
200 |
30.3 |
49.3 |
1692 |
400 |
10 |
12.6 |
24.6 |
294 |
1200 |
20 |
17.1 |
29.6 |
481 |
1200 |
30 |
19.3 |
32.8 |
660 |
800 |
0.9 |
50 |
23.2 |
40.2 |
1021 |
800 |
100 |
31.3 |
50.3 |
1832 |
400 |
150 |
39.2 |
59.7 |
2573 |
400 |
200 |
43.3 |
65.3 |
3274 |
400 |
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