MAKE-UP OF CABLE
Cable Size
(pairs) |
No.of pairs
Centre |
Units
1st Year |
Super Units
2nd Year |
Spare
Pairs |
5
10
20
50
100
200
400
600
800
1000
1200 |
5
2
2
5*10(U)
5*20(U)
4*50(SU)
2*50(SU)
1*100(SU)
2*100(SU)
2*100(SU)
3*100(SU) |
...
8
6
...
...
...
6*50(SU)
5*100(SU)
6*100(SU)
8*100(SU)
9*100(SU) |
...
...
12
...
...
...
...
...
...
...
... |
...
...
...
...
...
...
...
6
8
10
12 |
Note: Spare pairs provided for cables of more than 600 pairs only.
U- Units of 10/20 pairs
SU- Super units of 50/100
pairs
 |
 |
 |
 |
| 20 Pair |
100 Pair |
400 Pair |
1200 Pair |
Typical Core Formation
Colours of Helical Binders of
Insulation
colours |
Units |
Supper
Units |
White
Red
Black
Yellow
Blue
Orange
Green
Brown
Grey |
Blue
Orange
Green
Brown
Grey |
Red
White
Black |
ELECTRICAAL CHARACTERISTICS
Normal Dia. of Cond-
uctor
in mm |
Average D.C
resistance
Ohms/km |
Maxi-
mum Average
Mutal Capacit
ance nF/km |
Attention
at 150 kHz
(db/km) |
Cross Talk
at
150 kHz |
Capacit-
ance
Unbal-
ance
(per km) |
0.400.50
0.63
0.90 |
13586
58
28 |
5555
55
55 |
128.25
6.3
4.4 |
Near Enddd NEXT
(db/km) )
better
than
55.0 db/km
(Between
pairs) |
Far End
ELFEXT
(db/km
RMS 67.8
Individual
55.0 |
For all
sizes
Less
than
200 PF |
Insulation Resistance> 5000 meg ohms/km
PHYSICAL CHARACTERISTICS
Approximatee weight and diameter of Cables
| Wire dia. in mm.
0.5 |
No. of Pairs
10*
20
50
100
200
400
600
800
1000
1200 |
Outer dia
in mm.
12.00
14.50
25.00
33.00
42.00
55.00
64.00
72.00
80.00
87.00 |
Approximate
weight/Km. in Kg.
150235
1070
1890
2895
4735
6535
8175
9800
11330 |
Standard Length
in mtrs.
10001000
1000
500
400
200
200
200
200
200 |
|
0.63 |
20 50
100
200
400
600
800 |
23.50 30.50
39.00
49.00
66.00
77.00
87.00 |
805 1310
2450
3930
6380
9050
11425 |
1000 1000
500
400
200
200
200 |
|
0.90 |
20 50
100
200
400 |
29.00 39.00
50.00
67.00
90.00 |
1180 2500
4115
7000
11720 |
1000 500
400
200
200 |
*Mark indicates Unarmoured Cable.
Armouring with 0.5 mm thick for smaller size cable and 0.8 mm for high size Cables |
