Cellular PE Insulated & PE Sheathed Jelly Filled Cables to CW 1236

Applications

The cables are fully filled with petroleum jelly, being designed for use in access or trunk networks, from telephone exchange to subscriber area. The cables are suitable for installation in ducts and direct burial in the ground.

Standards

CW 1236

Construction

Telephone Cable -  CW 1236 CW1236 - 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 Cellular polyethylene as per BS 6234/BS EN 50290-2-23/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 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. Standard construction is per CW 1236 given in Cable Make Up Diagram.
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 An optional aluminium tape (0.15mm) coated with PE-copolymer on one or both sides is applied longitudinally with overlap over the cable core to provide 100% electrical shielding coverage and ensures 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) One tinned copper drain wire may be longitudinally laid to ensure electrical continuity of the screen.

Optional Construction

Armoured Cable: Steel wire armour or corrugated steel tape armour is applied over an optional inner olyethylene sheath. For steel tape version, the 0.15mm thick steel tape is coated with a copolymer and applied with an overlap. An outer polyethylene sheath is applied over the armour.

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 1500 1500 1500 1500 1500
Maximum Average Mutual Capacitance @800Hz* nF/km 56 56 56 56 59
Maximum Individual Mutual Capacitance @800Hz (for 99% cases) nF/km 64 64 64 64 65
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 0.145 0.175 0.20 0.26 0.30
Nominal Insulated Conductor Diameter mm 0.61 0.75 0.90 1.15 1.50

*Mutual capacitance values for 0.63mm & 0.9mm may be increased by 3% for cables with a nominal number of pairs less than 400.

 

Telephone Cable -  CW 1236 CW1236 - Telephone Cables

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 1236 given in Colour Code Chart.

Dimensions and weight

Cellular PE Insulated and LAP Sheathed Jelly Filled Cable to CW 1236

Cable Code Number of Pairs Minimum Sheath
Thickness
mm
Maximum Overall
Diameter
mm
Nominal Weight
kg/km
0.32mm Conductor, 0.61mm Insulated Wire
TP1236-02YF(L)2Y-100P032 100 1.6 17.0 350
TP1236-02YF(L)2Y-200P032 200 1.7 22.0 578
TP1236-02YF(L)2Y-300P032 300 1.8 26.0 850
TP1236-02YF(L)2Y-400P032 400 1.8 29.0 1069
TP1236-02YF(L)2Y-500P032 500 1.9 32.0 1213
TP1236-02YF(L)2Y-600P032 600 1.9 34.0 1472
TP1236-02YF(L)2Y-800P032 800 2.0 39.0 1954
TP1236-02YF(L)2Y-1000P032 1000 2.1 42.5 2419
TP1236-02YF(L)2Y-1200P032 1200 2.2 47.0 2954
TP1236-02YF(L)2Y-1600P032 1600 2.3 53.0 3391
TP1236-02YF(L)2Y-2000P032 2000 2.4 58.5 3648
TP1236-02YF(L)2Y-2400P032 2400 2.5 62.0 4180
TP1236-02YF(L)2Y-3200P032 3200 2.6 70.0 4636
0.4mm Conductor, 0.75mm Insulated Wire
TP1236-02YF(L)2Y-50P04 50 1.6 16.0 260
TP1236-02YF(L)2Y-100P04 100 1.7 20.5 470
TP1236-02YF(L)2Y-200P04 200 1.8 26.0 855
TP1236-02YF(L)2Y-300P04 300 1.9 30.5 1245
TP1236-02YF(L)2Y-400P04 400 1.9 35.0 1650
TP1236-02YF(L)2Y-500P04 500 2.0 37.5 1900
TP1236-02YF(L)2Y-600P04 600 2.1 40.5 2310
TP1236-02YF(L)2Y-800P04 800 2.2 46.5 3080
TP1236-02YF(L)2Y-1000P04 1000 2.3 51.5 3785
TP1236-02YF(L)2Y-1200P04 1200 2.4 56.0 4600
TP1236-02YF(L)2Y-1600P04 1600 2.6 65.5 6000
TP1236-02YF(L)2Y-2000P04 2000 2.6 70.0 7300
0.5mm Conductor, 0.9mm Insulated Wire
TP1236-02YF(L)2Y-50P05 50 1.6 19.0 385
TP1236-02YF(L)2Y-100P05 100 1.7 23.5 700
TP1236-02YF(L)2Y-200P05 200 1.9 30.5 1300
TP1236-02YF(L)2Y-300P05 300 2.0 37.0 1900
TP1236-02YF(L)2Y-400P05 400 2.1 42.5 2500
TP1236-02YF(L)2Y-500P05 500 2.2 46.0 3010
TP1236-02YF(L)2Y-600P05 600 2.2 49.5 3650
TP1236-02YF(L)2Y-800P05 800 2.4 56.5 4900
TP1236-02YF(L)2Y-1000P05 1000 2.5 62.5 6000
TP1236-02YF(L)2Y-1200P05 1200 2.6 69.0 7100
0.63mm Conductor, 1.15mm Insulated Wire
TP1236-02YF(L)2Y-50P063 50 1.7 22.0 550
TP1236-02YF(L)2Y-100P063 100 1.8 28.0 1000
TP1236-02YF(L)2Y-200P063 200 2.0 37.5 1900
TP1236-02YF(L)2Y-300P063 300 2.2 46.0 2850
TP1236-02YF(L)2Y-400P063 400 2.3 52.5 3750
TP1236-02YF(L)2Y-500P063 500 2.4 56.5 4500
TP1236-02YF(L)2Y-600P063 600 2.5 61.0 5400
TP1236-02YF(L)2Y-800P063 800 2.7 70.5 7250
0.9mm Conductor, 1.5mm Insulated Wire
TP1236-02YF(L)2Y-50P09 50 1.8 27.5 1000
TP1236-02YF(L)2Y-100P09 100 2.0 38.0 2000

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

Cellular PE Insulated, PE Inner Sheathed, Corrugated Steel Tape Armoured & LAP Sheathed Jelly Filled Cable

Cable Code Number of
Pairs
Minimum Bedding
Thickness
mm
Steel Tape
Thickness
mm
Minimum Sheath
Thickness
mm
Maximum Overall
Diameter
mm
Nominal
Weight
kg/km
0.4mm Conductor, 0.75mm Insulated Wire
TP1236-02YF(L)2Y(STA)2Y-10P04 10 1.0 0.15 1.3 15.5 180
TP1236-02YF(L)2Y(STA)2Y-20P04 20 1.0 0.15 1.3 18.0 230
TP1236-02YF(L)2Y(STA)2Y-30P04 30 1.1 0.15 1.4 19.5 295
TP1236-02YF(L)2Y(STA)2Y-50P04 50 1.1 0.15 1.5 20.0 400
TP1236-02YF(L)2Y(STA)2Y-100P04 100 1.2 0.15 1.6 27.0 665
TP1236-02YF(L)2Y(STA)2Y-200P04 200 1.3 0.15 1.7 31.0 1100
0.5mm Conductor, 0.9mm Insulated Wire
TP1236-02YF(L)2Y(STA)2Y-10P05 10 1.0 0.15 1.2 16.6 225
TP1236-02YF(L)2Y(STA)2Y-20P05 20 1.0 0.15 1.2 19.5 315
TP1236-02YF(L)2Y(STA)2Y-30P05 30 1.1 0.15 1.3 20.5 395
TP1236-02YF(L)2Y(STA)2Y-50P05 50 1.1 0.15 1.3 23.0 550
TP1236-02YF(L)2Y(STA)2Y-100P05 100 1.2 0.15 1.5 28.5 885
TP1236-02YF(L)2Y(STA)2Y-200P05 200 1.3 0.15 1.6 35.5 1465
0.63mm Conductor, 1.15mm Insulated Wire
TP1236-02YF(L)2Y(STA)2Y-10P063 10 1.0 0.15 1.3 18.5 290
TP1236-02YF(L)2Y(STA)2Y-20P063 20 1.1 0.15 1.4 21.5 400
TP1236-02YF(L)2Y(STA)2Y-30P063 30 1.1 0.15 1.4 23.0 530
TP1236-02YF(L)2Y(STA)2Y-50P063 50 1.2 0.15 1.6 26.0 750
TP1236-02YF(L)2Y(STA)2Y-100P063 100 1.3 0.15 1.7 33.0 1280
TP1236-02YF(L)2Y(STA)2Y-200P063 200 1.7 0.15 2.0 43.0 2325
0.9mm Conductor, 1.5mm Insulated Wire
TP1236-02YF(L)2Y(STA)2Y-10P09 10 1.1 0.15 1.5 20.5 395
TP1236-02YF(L)2Y(STA)2Y-20P09 20 1.1 0.15 1.5 24.0 625
TP1236-02YF(L)2Y(STA)2Y-30P09 30 1.3 0.15 1.6 27.0 880
TP1236-02YF(L)2Y(STA)2Y-50P09 50 1.3 0.15 1.7 33.5 1285
TP1236-02YF(L)2Y(STA)2Y-100P09 100 1.5 0.15 2.1 45.0 2430
TP1236-02YF(L)2Y(STA)2Y-200P09 200 2.2 0.15 2.5 55.0 4195

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

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