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Conductor:
- Solid, annealed, bare copper condutor of 0.4, 0.5. 0.63, 0.9mm
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Rip Cord:
- A ripcord is laid within the moisture barrier
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Insulation:
- Special polyethylene (PE) compound to BT M142
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Sheath:
- Cables are screened with aluminium foil tape and black polyethylene jacket
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Cable Formation:
- Two insulated conductors designated as a-wire and b-wire, are twisted together to form a pair. Every 5 pairs or 10 pairs, are formed as a sub-unit, 4 or 2 sub-units form a 20 pairs unit. Units and sub-units are separated by different color tapes.
- For cable sizes of 100 pairs and above, each unit shall consists of 25 pairs and four single units shall be stranded together to form a quadraple unit of 100 pair cable.
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Applications:
- For outdoor wiring installations
- For distribution or junction network in exchange premises
Construction:
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Core Wrapping:
- The interstices of the cable core are fully filled with special premium quality water resistant compound to block water ingress. Each core is wrapped with a non-hygroscopic tape.
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Electrical characteristics at 20°C:
| Conductor Size |
mm |
mm |
mm |
| 0.4 |
0.5 |
0.63 |
| Maximum Conductor Resistance (ohms/Km) |
144.4 |
90.2 |
57.1 |
| Resistance Unbalance (%) |
Ave. |
2.0 |
1.5 |
1.5 |
| Ind. Max. |
5.0 |
5.0 |
4.0 |
Dielectric Strength
Conductor to Conductor
Conductor to Ground |
D.C.2.4KV/3 Sec. |
D.C.3.0KV/3 Sec. |
D.C.3.6KV/3 Sec. |
| D.C.10KV/3 Sec. |
| Average Mutual Capacitance (at 1KHz) |
Max. Ave.: 52+2 nF/Km |
| Capacitance Unbalance |
Pair-Pair |
RMS Max: 45.3 PF/Km |
| Pair-Ground |
Individual Maximum: 2625 PF/Km
Maximum Average: 547 PF/Km |
| Mutual Conductance at 1KHz |
Max. 20Ω/Km |
| Insulation Resistance |
Min. 6,500 MΩ/Km |
| Attenuation Nom. (dB/Km) |
150KHz |
11.9 |
8.3 |
6.2 |
| 772KHz |
22.8 |
18.5 |
14.6 |
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Color Scheme for 25 Pair Units
| Pair No. |
Wire A |
Wire B |
Pair No. |
Wire A |
Wire B |
1
2
3
4
5
6
7
8
9
10
11
12
13 |
White
White
White
White
White
Red
Red
Red
Red
Red
Black
Black
Black |
Blue
Orange
Green
Brown
Grey
Blue
Orange
Green
Brown
Grey
Blue
Orange
Green |
14
15
16
17
18
19
20
21
22
23
24
25
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Black
Black
Yellow
Yellow
Yellow
Yellow
Yellow
Violet
Violet
Violet
Violet
Violet
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Brown
Grey
Blue
Orange
Green
Brown
Grey
Blue
Orange
Green
Brown
Grey
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Cable Dimension
Number of
Pairs
(Prs) |
Nominal Out.
Diameter
(mm) |
Approx.
Weight
(Kg/Km) |
Standard
Length
(m) |
| 26 AWG (0.4mm) |
10
25
50
100
200 |
10
13
15
20
25 |
120
200
300
450
850 |
1,000
1,000
1,000
1,000
1,000 |
| 24 AWG (0.5mm) |
10
25
50
100
200 |
11
14
18
23
30 |
150
250
400
700
1,300 |
1,000
1,000
1,000
1,000
1,000 |
| 22 AWG (0.6mm) |
10
25
50
100
200 |
13
17
21
28
37 |
200
350
600
1,100
2,100 |
1,000
1,000
1,000
1,000
750 |
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