Telephone Cables

 Thin Wall Cellular PE Insulated & PE Sheathed Air Core Cables to CW 1224

Application

The cables are designed for local main network where it is pressurized. They are used as subscriber distribution cables and as connection between central offices. The cables are suitable for installation in ducts in access or trunk networks.

Standards

• CW 1224

Construction

Telephone Cables

Telephone Cables

Conductors
Solid annealed bare copper, 0.32/0.4/0.5/0.63/0.9mm as per class 1 of BS 6360/IEC 60228

Insulation
Solid annealed bare copper, 0.32/0.4/0.5/0.63/0.9mm as per class 1 of BS 6360/IEC 60228

Twisted Pairs
Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk

Cabling Element
Twisted Pairs

Cable Core Assembly
Cables with up to 100 pairs are composed of 25-pair units or 12/13-pair units; cables with over 100 pairs are composed of 25, 50 or 100-pair units cabled together. Any extra pairs form a separate unit. Units are identified by colour coded binders

Core Wrapping
One or more non-hygroscopic polyester tapes are helically or longitudinally laid with an overlap. These tapes furnish thermal, mechanical as well as high dielectric protection between shielding and individual conductors

Moisture Barrier(optional)
A layer of aluminium tape (0.15mm) coated with PE-copolymer on one or both sides and applied longitudinally with overlap over the cable core to provide 100% electrical shielding coverage and ensures a barrier against water vapor

Sheath
Black low density polyethylene as per BS 6234/IEC 60708, being able to withstand exposure to sunlight, temperature variations, ground chemicals and other environmental contaminants

Ripcord
Ripcord may be provided for slitting the sheath longitudinally to facilitate its removal

Spare Pairs (optional)
Spare pairs may be incorporated for 200 and larger pair cables

Continuity Wire (optional)
One tinned copper drain wire may be longitudinally laid to ensure electrical continuity of the screen

Electrical Properties

Nominal Conductor Diameter

mm

0.32

0.4

0.5

0.63

0.9

Conductor Gauge Size

AWG

28

26

24

22

19

Conductor Size

mm2

0.08

0.126

0.196

0.312

0.636

Maximum Average Conductor Resistance @20°C

Ω/km

223 143 91 58 28

Minimum Insulation Resistance @500V DC

MΩ.km 6500 6500 6500 6500 6500

Maximum Average Mutual Capacitance @800Hz*

nF/km 53 53 53 56 59

Maximum Individual Mutual Capacitance @800Hz (for 99% cases)

nF/km 60 60 60 60 64
Maximum Individual Capacitance Unbalance @800Hz pair-to-pair
(for 99% cases)
pF/500m 275 275 275 275 275
Maximum Conductor Loop Resistance @20°C Ω/km 470 300 192 114 60
Impedance @1KHz Ω 1000 994 796 660 445
Impedance @100KHz Ω 156 147 134 125 122
Impedance @512KHz Ω 122 120 118 117 116
Impedance @1MHz Ω 120 117 115 114 113
Maximum Average Attenuation @0.8KHz dB/km 1.76 1.64 1.30 1.04 0.74
Maximum Average Attenuation @1KHz dB/km 1.8 1.68 1.35 1.08 0.76
Maximum Average Attenuation @3KHz dB/km 3.4 3.18 2.52 2.01 1.42
Maximum Average Attenuation @150KHz dB/km 16.8 11.4 8.3 6.2 4.4
Maximum Average Attenuation @772KHz dB/km 29.5 24.3 19.4 15.4 10.8
Maximum Average Attenuation @1000KHz dB/km 33.5 27.1 21.4 17.5 12.8

Dielectric Strength Conductor to Conductor (3secs)

V DC 500 500 500 500 500

Nominal Insulation Thickness

mm 0.095 0.13 0.15 0.175 0.225

Nominal Insulated Conductor Diameter

mm 0.51 0.66 0.8 0.98 1.35

 

 

 

 

 

 

 

 

* Mutual capacitance values may be increased by 3% for cables with a nominal number of pairs less than 400.

Mechanical and Thermal Properties

Temperature range during operation (fixed state): -30°C – +70°C
Temperature range during installation (mobile state): -20°C – +50°C
Minimum bending radius: 10 x Overall Diameter (unarmoured cables);15 x Overall Diameter (armoured cables)

Colour Code
Standard colour code is per CW 1224 given in Colour Code Chart

Dimensions And Weight
Cellular PE Insulated & LAP Sheathed Air Core Cable to CW 1224

Cable Code Number
of
Pairs
Minimum Sheath
Thickness
mm
Maximum Overall
Diameter
mm
Nominal
Weight
kg/km
0.32mm Conductor, 0.51mm Insulated Wire

TP1224-02Y(L)2Y-100P032

100

1.6

16.0

266

TP1224-02Y(L)2Y-200P032

200

1.7

20.0

490

TP1224-02Y(L)2Y-300P032

300

1.7

23.5

706

TP1224-02Y(L)2Y-400P032

400

1.8

26.0

910

TP1224-02Y(L)2Y-500P032

500

1.8

28.5

1085

TP1224-02Y(L)2Y-600P032

600

1.9

31.0

1330

TP1224-02Y(L)2Y-800P032

800

1.9

34.5

1740

TP1224-02Y(L)2Y-1000P032

1000

2.0

38.0

2150

TP1224-02Y(L)2Y-1200P032

1200

2.1

41.0

2560

TP1224-02Y(L)2Y-1600P032

1600

2.2

46.5

3370

TP1224-02Y(L)2Y-2000P032

2000

2.3

51.5

4180

TP1224-02Y(L)2Y-2400P032

2400

2.4

55.5

4990

TP1224-02Y(L)2Y-3200P032

3200

2.5

63.0

6610

TP1224-02Y(L)2Y-4000P032 4000 2.7 71.0 8230
TP1224-02Y(L)2Y-4800P032 4800 2.7 76.0 9850
0.4mm Conductor, 0.66mm Insulated Wire
TP1224-02Y(L)2Y-50P04 50 1.6 15.5

220

TP1224-02Y(L)2Y-100P04 100 1.6 19.0

380

TP1224-02Y(L)2Y-200P04 200 1.7 24.5

700

TP1224-02Y(L)2Y-300P04 300 1.8 28.5

1009

TP1224-02Y(L)2Y-400P04 400 1.9 32.0

1300

TP1224-02Y(L)2Y-500P04

500

1.9 35.0

1550

TP1224-02Y(L)2Y-600P04 600 2.0 38.0

1900

TP1224-02Y(L)2Y-800P04 800 2.1 43.0

2490

TP1224-02Y(L)2Y-1000P04 1000 2.2 47.5

3075

TP1224-02Y(L)2Y-1200P04 1200 2.3 51.5

3660

TP1224-02Y(L)2Y-1400P04 1400 2.4 55.5

4235

TP1224-02Y(L)2Y-1600P04 1600 2.4 58.5

4818

TP1224-02Y(L)2Y-2000P04 2000 2.5 64.5

5980

TP1224-02Y(L)2Y-2400P04 2400 2.6 70.0

7645

TP1224-02Y(L)2Y-3000P04 3000 2.8 74.0

9466

TP1224-02Y(L)2Y-3200P04 3200 3.0 80.0

10076

0.5mm Conductor, 0.8mm Insulated Wire
TP1224-02Y(L)2Y-50P05 50 1.6 17.0 320
TP1224-02Y(L)2Y-100P05 100 1.7 22.0 540
TP1224-02Y(L)2Y-200P05 200 1.8 28.5 1000
TP1224-02Y(L)2Y-300P05 300 1.9 33.5 1500
TP1224-02Y(L)2Y-400P05 400 2.0 37.5 1944
TP1224-02Y(L)2Y-500P05 500 2.1 41.5 2577
TP1224-02Y(L)2Y-600P05 600 2.1 44.5 2800
TP1224-02Y(L)2Y-800P05 800 2.3 51.5 3743
TP1224-02Y(L)2Y-1000P05 1000 2.4 56.0 4450
TP1224-02Y(L)2Y-1200P05 1200 2.5 61.5 5460
TP1224-02Y(L)2Y-1600P05 1600 2.6 69.5 7060
TP1224-02Y(L)2Y-2000P05 2000 2.7 75.0 8660
TP1224-02Y(L)2Y-2400P05 2400 2.7 80.0 10260
0.63mm Conductor, 0.98mm Insulated Wire
TP1224-02Y(L)2Y-100P063 100 1.7 25.0

785

TP1224-02Y(L)2Y-200P063 200 1.9 33.5

1490

TP1224-02Y(L)2Y-300P063

300 2.0 39.5

2200

TP1224-02Y(L)2Y-400P063 400 2.1 44.5

2890

TP1224-02Y(L)2Y-600P063 600 2.3 53.5

4235

TP1224-02Y(L)2Y-800P063 800 2.5 61.0

5590

TP1224-02Y(L)2Y-1000P063 1000 2.6 67.5

6800

TP1224-02Y(L)2Y-1200P063 1200 2.7 73.5

8100

TP1224-02Y(L)2Y-1600P063 1600 2.7 80.0

10700

0.9mm Conductor, 1.35mm Insulated Wire
TP1224-02Y(L)2Y-50P09 50 1.7 24.5

805

TP1224-02Y(L)2Y-100P09 100 1.9 32.5

1515

TP1224-02Y(L)2Y-200P09 200 2.1 45.0

2935

TP1224-02Y(L)2Y-300P09 300 2.4 56.0

4318

TP1224-02Y(L)2Y-400P09 400 2.5 62.0

5700

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*The above part number will be changed for unscreened cables by deleting the (L).