Telephone Cables

 Solid PE Insulated & PE Sheathed Jelly Filled Cables to CW 1326& CW 1326/1179

Application

The cables are designed for use as subscriber distribution cables and as connection between central offices in local access networks. The cables are jelly filled and suitable for installation in ducts. The cables are also available for direct burial in the ground and aerial installation with integral suspension strand. An armoured option is offered for direct burial installations. A figure-8 self support option is offered for aerial installation.

Standards

Telephone Cables   Telephone Cables

• CW 1326 (For unscreened cable)
• CW 1179 (For screened cable)
• CW 1252 (For self-supporting cable)

Construction

Conductors: Solid annealed bare copper, 0.5mm as per class 1 of BS 6360/IEC 60228
Insulation: Solid polyethylene as per BS EN 50290-2-23/BS 6234/IEC 60708
Twisted Pairs: Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk
Cabling Element: Twisted Pairs
Cable Core Assembly: Cables are composed of 10-pair units
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 is applied longitudinally with overlap over the cable core to provide shielding coverage and ensure a barrier against water vapor
Filling:
The cable core interstices are filled with petroleum jelly to avoid longitudinal water penetration within the cable. The water resistant filling compound is applied to the air space between non-hygroscopic tape and shield, shield and sheath within the cable core
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): Tinned copper drain wire may be longitudinally laid to ensure electrical continuity of the screen

Electrical Properties

Nominal Conductor Diameter

mm

0.5

Conductor Gauge Size

AWG

24

Conductor Size

mm2

0.196

Maximum Average Conductor Resistance @20°C

Ω/km

91

Minimum Insulation Resistance @500V DC

MΩ.km

1500

Maximum Average Mutual Capacitance @800Hz*

nF/km

56

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

nF/km

64

Maximum Individual Capacitance Unbalance @800Hz pair-to-pair

pF/500m

275

Maximum Conductor Loop Resistance @20°C

Ω/km

192

Impedance @1KHz

796

Impedance @100KHz

134

Impedance @512KHz

118

Impedance @1MHz

115

Maximum Average Attenuation @0.8KHz

dB/km

1.30

Maximum Average Attenuation @1KHz

dB/km

1.35

Maximum Average Attenuation @3KHz

dB/km

2.52

Maximum Average Attenuation @150KHz

dB/km

8.3

Maximum Average Attenuation @772KHz

dB/km

19.4

Maximum Average Attenuation @1000KHz

dB/km

21.4

Dielectric Strength Conductor to Conductor (3secs)

V DC

500

Nominal Insulation Thickness

mm

0.275

Nominal Insulated Conductor Diameter

mm

1.05

 
*For screened cables of 20 pairs or less, the maximum average mutual capacitance shall not apply and the maximum for 99% of cases shall be increased by 3nF

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 1326 given in the following Colour Code Chart

Cabling Element No.

a-wire

b-wire

Cabling Element No.

a-wire

b-wire

1

WHITE

BLUE

6

RED

BLUE

2

WHITE

ORANGE

7

RED

ORANGE

3

WHITE

GREEN

8

RED

GREEN

4

WHITE

BROWN

9

RED

BROWN

5

WHITE

GREY

10

RED

GREY

Units binders

No. of Units

Binder Colour

No. of Units

Binder Colour

1

BLUE

6

WHITE

2

ORANGE

7

RED

3

GREEN

8

BLACK

4

BROWN

9

YELLOW

5

GREY

10

VIOLET

 Dimensions And Weight

Solid PE Insulated and Unscreened/Screened PE Sheathed Jelly Filled Cable to CW 1326, CW 1326/1179

Cable Code

Number of Pairs

Minimum
Sheath Thickness mm

Maximum Overall
Diameter
mm
(Unscreened)

Nominal
Weight kg/km
(Unscreened)

Maximum Overall Diameter mm (Screened)

Nominal
Weight kg/km (Screened)

0.5mm Conductor, 1.05mm Insulated Wire

TP1326-2YF(L)2Y-2P05

2

1.1

8.5

55

10.0

65

TP1326-2YF(L)2Y-5P05

5

1.2

8.5

77

10.0

87

TP1326-2YF(L)2Y-10P05

10

1.2

12.0

126

13.5

137

TP1326-2YF(L)2Y-20P05

20

1.3

15.0

221

16.5

231

TP1326-2YF(L)2Y-30P05

30

1.4

18.0

332

19.5

347

TP1326-2YF(L)2Y-50P05

50

1.4

19.5

483

21.0

504

TP1326-2YF(L)2Y-100P05

100

1.5

25.0

933

26.5

956

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

Solid PE Insulated, PE Inner Sheathed, Steel Wire Armoured and PE Outer Sheathed Jelly Filled Cable to CW 1326/1198 (Unscreened)

Cable Code

Number
of
Pairs

Minimum
Bedding
Thickness
mm

Steel Wire
Diameter
mm

Minimum
Sheath
Thickness
mm

Maximum Overall
Diameter
mm

Nominal
Weight
kg/km

0.5mm Conductor, 1.05mm Insulated Wire

TP1326-2YF2Y(SWA)2Y-2P05

2

1.1

0.9

0.9

13.7

241

TP1326-2YF2Y(SWA)2Y-5P05

5

1.2

0.9

0.9

13.7

274

TP1326-2YF2Y(SWA)2Y-10P05

10

1.2

0.9

0.9

17.2

351

TP1326-2YF2Y(SWA)2Y-20P05

20

1.3

1.25

0.9

20.9

499

TP1326-2YF2Y(SWA)2Y-30P05

30

1.4

2.0

1.0

24.8

749

TP1326-2YF2Y(SWA)2Y-50P05

50

1.4

2.0

1.0

26.3

1123

TP1326-2YF2Y(SWA)2Y-100P05

100

1.5

2.0

1.1

32.0

1763

Solid PE Insulated, PE Inner Sheathed, Steel Wire Armoured and PE Outer Sheathed Jelly Filled Cable to CW 1326
/1179/1198 (Screened)

Cable Code

Number
of
Pairs

Minimum
Bedding
Thickness
mm

Steel Wire
Diameter
mm

Minimum
Sheath
Thickness
mm

Maximum Overall
Diameter
mm

Nominal
Weight
kg/km

0.5mm Conductor, 1.05mm Insulated Wire

TP1326-2YF(L)2Y(SWA)2Y-2P05

2

1.1

0.9

0.9

15.2

251

TP1326-2YF(L)2Y(SWA)2Y-5P05

5

1.2

0.9

0.9

15.2

286

TP1326-2YF(L)2Y(SWA)2Y-10P05

10

1.2

1.25

0.9

19.4

363

TP1326-2YF(L)2Y(SWA)2Y-20P05

20

1.3

2.0

1.0

23.3

501

TP1326-2YF(L)2Y(SWA)2Y-30P05

30

1.4

2.0

1.0

26.3

752

TP1326-2YF(L)2Y(SWA)2Y-50P05

50

1.4

2.0

1.1

28.0

1139