PE Insulated & LAP Sheathed Air Core Cables to IEC 60708

Applications

The cables are designed for use in access or trunk networks, from telephone exchange to subscriber area. The cables are suitable for installation in ducts, direct burial in the ground and also for 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

  • IEC 60708

Construction

Telephone Cable - IEC 60708 IEC-60708 - Telephone Cables
Conductors Solid annealed bare copper, 0.4/0.5/0.6/0.8mm as per BS6360/IEC 60228 Class 1.
Insulation Solid polyethylene as per IEC 60708/BS EN 50290-2-23/BS6234/ASTM D 1248/NFC 32-060/VDE 0207.
Twinning Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk.
Cabling Element Pairs or Quads.
Cable Core Assembly Cables with 100 pairs or less are composed of 10-pair sub-units; cables with over 100 pairs are composed of 50 or 100-pair units. Any extra pairs form a separate unit. Units are identified by colour coded binders. Standard construction is per IEC 60708 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 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 electrical shielding coverage and ensure a barrier against water vapor. In cables with more than 200 pairs, the aluminum tape may be corrugated for improved cable flexibility.
Sheath Black low density polyethylene as per BS6234/IEC 60708/ASTM D 1248, being able to withstand exposure to sunlight, temperature variations, ground chemicals and other environmental conditions.
Ripcord Ripcord may be provided for slitting the sheath longitudinally to facilitate its removal.
Spare Pairs (optional) Spare pairs may be incorporated in large pair cables.
Continuity Wire (optional) 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 polyethylene sheath.
For steel tape version, the steel tape is 0.15mm thick, being coated with a PE copolymer and applied with an overlap.
An outer polyethylene sheath is applied over the armour.
Self-Support Cables Per CW1252. A 7-strand galvanized steel support wire. Black polyethylene sheath covers both core and support wire in a figure-8 construction.

Electrical properties

Nominal Conductor Diameter mm 0.4 0.5 0.6 0.8
Conductor Gauge Size AWG 26 24 - 20
Conductor Size mm2 0.126 0.196 0.283 0.5
Maximum Average Conductor Resistance @20°C Ω/km 143 91 63 34.6
Minimum Insulation Resistance @500V DC MΩ.km 5000 5000 5000 5000
Maximum Average Mutual Capacitance @800Hz nF/km 53 53 56 59
Maximum Individual Mutual Capacitance
@800Hz (for 99% cases)
nF/km 60 60 60 64
Maximum Individual Capacitance Unbalance
@800Hz pair-to-pair
pF/500m 250 250 250 160
Maximum Individual Capacitance Unbalance
@800Hz pair-to-pair (for 95% cases)
pF/500m 150 150 150 100
Maximum Individual Capacitance Unbalance
@800Hz pair-to-ground
pF/500m 1700 1700 1700 1700
Maximum Individual Capacitance Unbalance
@800Hz pair-to-ground (for 95% cases)
pF/500m 1000 1000 1000 1000
Maximum Conductor Loop Resistance @20°C Ω/km 300 192 130 73
Impedance @1KHz Ω 994 796 665 500
Impedance @100KHz Ω 147 134 127 124
Impedance @512KHz Ω 120 118 117.5 116.5
Impedance @1MHz Ω 117 115 114.5 113.5
Maximum Average Attenuation @0.8KHz dB/km 1.64 1.30 1.1 0.9
Maximum Average Attenuation @1KHz dB/km 1.68 1.35 1.14 0.93
Maximum Average Attenuation @3KHz dB/km 3.18 2.52 2.3 1.74
Maximum Average Attenuation @150KHz dB/km 11.4 8.3 7.2 5.7
Maximum Average Attenuation @772KHz dB/km 24.3 19.4 17.4 13.1
Maximum Average Attenuation @1000KHz dB/km 27.1 21.4 18.5 13.7
Dielectric Strength          
Conductor to Conductor (1min) V DC 500 500 500 500
Conductor to Screen (1min) V DC 1000 1000 1000 1000
Nominal Insulation Thickness mm 0.175 0.20 0.25 0.3
Nominal Insulated Conductor Diameter mm 0.75 0.90 1.1 1.4

 

Telephone Cable - IEC 60708 IEC-60708 - 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 IEC 60708 given in Colour Code Chart.

Dimensions and weight

Solid PE Insulated & LAP Sheathed Air Core Cable to IEC 60708

Cable Code Number of Pairs Nominal Sheath Thickness Nominal Overall Diameter Nominal Weight
mm mm kg/km
0.4mm Conductor, 0.75mm Insulated Wire
TP708-2Y(L)2Y-10P04 10 1.5 9 71
TP708-2Y(L)2Y-20P04 20 1.5 10 107
TP708-2Y(L)2Y-30P04 30 1.5 11 143
TP708-2Y(L)2Y-50P04 50 1.5 13 211
TP708-2Y(L)2Y-70P04 70 1.5 15 278
TP708-2Y(L)2Y-100P04 100 1.5 17 380
TP708-2Y(L)2Y-150P04 150 1.5 21 548
TP708-2Y(L)2Y-200P04 200 1.8 23 708
TP708-2Y(L)2Y-300P04 300 1.8 28 1034
TP708-2Y(L)2Y-400P04 400 1.8 31 1358
TP708-2Y(L)2Y-500P04 500 2.0 35 1703
TP708-2Y(L)2Y-600P04 600 2.0 38 2016
TP708-2Y(L)2Y-800P04 800 2.5 43 2639
TP708-2Y(L)2Y-900P04 900 2.5 46 2961
TP708-2Y(L)2Y-1000P04 1000 2.5 48 3264
TP708-2Y(L)2Y-1200P04 1200 2.8 52 3873
TP708-2Y(L)2Y-1500P04 1500 2.8 58 4819
TP708-2Y(L)2Y-1800P04 1800 3.2 63 5777
TP708-2Y(L)2Y-2100P04 2100 3.2 68 6731
TP708-2Y(L)2Y-2400P04 2400 3.5 72 7645
TP708-2Y(L)2Y-2700P04 2700 3.5 76 8556
TP708-2Y(L)2Y-3000P04 3000 3.5 80 9466
0.5mm Conductor, 0.9mm Insulated Wire
TP708-2Y(L)2Y-10P05 10 1.5 10 94
TP708-2Y(L)2Y-20P05 20 1.5 11 147
TP708-2Y(L)2Y-30P05 30 1.5 13 201
TP708-2Y(L)2Y-50P05 50 1.5 16 305
TP708-2Y(L)2Y-70P05 70 1.5 18 406
TP708-2Y(L)2Y-100P05 100 1.5 21 561
TP708-2Y(L)2Y-150P05 150 1.8 25 829
TP708-2Y(L)2Y-200P05 200 1.8 28 1074
TP708-2Y(L)2Y-300P05 300 2.0 34 1582
TP708-2Y(L)2Y-400P05 400 2.0 39 2093
TP708-2Y(L)2Y-500P05 500 2.5 43 2577
TP708-2Y(L)2Y-600P05 600 2.5 47 3073
TP708-2Y(L)2Y-800P05 800 2.8 53 4033
TP708-2Y(L)2Y-900P05 900 2.8 57 4541
TP708-2Y(L)2Y-1000P05 1000 2.8 60 5015
TP708-2Y(L)2Y-1200P05 1200 3.2 65 5959
TP708-2Y(L)2Y-1500P05 1500 3.5 72 7414
0.6mm Conductor, 1.1mm Insulated Wire
TP708-2Y(L)2Y-10P06 10 1.5 11 119
TP708-2Y(L)2Y-20P06 20 1.5 13 194
TP708-2Y(L)2Y-30P06 30 1.5 15 269
TP708-2Y(L)2Y-50P06 50 1.5 18 416
TP708-2Y(L)2Y-70P06 70 1.5 21 558
TP708-2Y(L)2Y-100P06 100 1.8 25 782
TP708-2Y(L)2Y-150P06 150 1.8 29 1143
TP708-2Y(L)2Y-200P06 200 2.0 33 1505
TP708-2Y(L)2Y-300P06 300 2.0 40 2238
TP708-2Y(L)2Y-400P06 400  2.5 46 2944
TP708-2Y(L)2Y-500P06 500 2.5 51 3633
TP708-2Y(L)2Y-600P06 600 2.8 55 4353
TP708-2Y(L)2Y-800P06  800 3.2 63 5722
TP708-2Y(L)2Y-900P06 900 3.2 67 6438
TP708-2Y(L)2Y-1000P06 1000 3.2 70 7115
TP708-2Y(L)2Y-1200P06 1200 3.5 76 8462
0.8mm Conductor, 1.4mm Insulated Wire
TP708-2Y(L)2Y-10P08 10 1.5 13 178
TP708-2Y(L)2Y-20P08 20 1.5 16 305
TP708-2Y(L)2Y-30P08 30 1.5 19 431
TP708-2Y(L)2Y-50P08 50 1.5 23 678
TP708-2Y(L)2Y-70P08 70 1.8 27 929
TP708-2Y(L)2Y-100P08 100 1.8 31 1313
TP708-2Y(L)2Y-150P08 150 2.0 38 1963
TP708-2Y(L)2Y-200P08 200 2.5 43 2574
TP708-2Y(L)2Y-300P08 300 2.8 52 3790
TP708-2Y(L)2Y-400P08  400 2.8 60 5019
TP708-2Y(L)2Y-500P08 500 3.2 67 6249
TP708-2Y(L)2Y-600P08 600 3.5 73 7437

 

Telephone Cable - IEC 60708 IEC-60708 - Telephone Cables

Solid PE Insulated, Double Steel Tape Armoured & LAP Sheathed Air Core Cable to IEC 60708

Cable Code Number of Pairs Nominal Sheath Thickness Nominal Outer Sheath Thickness Nominal Overall Diameter Nominal Weight
mm mm mm kg/km
0.4mm Conductor, 0.75mm Insulated Wire
TP708-2Y(L)2Y(DSTA)2Y-10P04 10 1.5 1.5 12 177
TP708-2Y(L)2Y(DSTA)2Y-20P04 20 1.5 1.5 14 227
TP708-2Y(L)2Y(DSTA)2Y-30P04 30 1.5 1.5 15 277
TP708-2Y(L)2Y(DSTA)2Y-50P04 50 1.5 1.5 18 380
TP708-2Y(L)2Y(DSTA)2Y-70P04 70 1.5 1.5 19 467
TP708-2Y(L)2Y(DSTA)2Y-100P04 100 1.5 1.5 22 594
TP708-2Y(L)2Y(DSTA)2Y-150P04 150 1.5 1.8 25 805
TP708-2Y(L)2Y(DSTA)2Y-200P04 200 1.8 1.8 27 995
TP708-2Y(L)2Y(DSTA)2Y-300P04 300 1.8 1.8 32 1382
TP708-2Y(L)2Y(DSTA)2Y-400P04 400 1.8 1.8 37 1809
TP708-2Y(L)2Y(DSTA)2Y-500P04 500 2.0 2.0 43 2704
TP708-2Y(L)2Y(DSTA)2Y-600P04 600 2.0 2.0 46 3092
TP708-2Y(L)2Y(DSTA)2Y-800P04 800 2.5 2.5 51 3846
TP708-2Y(L)2Y(DSTA)2Y-900P04 900 2.5 2.5 54 4250
TP708-2Y(L)2Y(DSTA)2Y-1000P04 1000 2.5 2.5 56 4612
TP708-2Y(L)2Y(DSTA)2Y-1200P04 1200 2.8 2.8 61 5369
0.5mm Conductor, 0.9mm Insulated Wire
TP708-2Y(L)2Y(DSTA)2Y-10P05 10 1.5 1.5 13 213
TP708-2Y(L)2Y(DSTA)2Y-20P05 20 1.5 1.5 15 283
TP708-2Y(L)2Y(DSTA)2Y-30P05 30 1.5 1.5 17 356
TP708-2Y(L)2Y(DSTA)2Y-50P05 50 1.5 1.5 20 503
TP708-2Y(L)2Y(DSTA)2Y-70P05 70 1.5 1.5 22 629
TP708-2Y(L)2Y(DSTA)2Y-100P05 100 1.5 1.8 25 822
TP708-2Y(L)2Y(DSTA)2Y-150P05 150 1.8 1.8 30 1145
TP708-2Y(L)2Y(DSTA)2Y-200P05 200 1.8 1.8 33 1428
TP708-2Y(L)2Y(DSTA)2Y-300P05 300 2.0 2.0 42 2542
TP708-2Y(L)2Y(DSTA)2Y-400P05 400 2.0 2.5 47 3191
TP708-2Y(L)2Y(DSTA)2Y-500P05 500 2.5 2.5 51 3778
TP708-2Y(L)2Y(DSTA)2Y-600P05 600 2.5 2.8 55 4392
TP708-2Y(L)2Y(DSTA)2Y-800P05 800 2.8 3.2 62 5563
TP708-2Y(L)2Y(DSTA)2Y-900P05 900 2.8 3.2 65 6135
TP708-2Y(L)2Y(DSTA)2Y-1000P05 1000 2.8 3.5 68 6682
0.6mm Conductor, 1.1mm Insulated Wire
TP708-2Y(L)2Y(DSTA)2Y-10P06 10 1.5 1.5 15 250
TP708-2Y(L)2Y(DSTA)2Y-20P06 20 1.5 1.5 17 347
TP708-2Y(L)2Y(DSTA)2Y-30P06 30 1.5 1.5 19 456
TP708-2Y(L)2Y(DSTA)2Y-50P06  50 1.5 1.5 22 639
TP708-2Y(L)2Y(DSTA)2Y-70P06 70 1.5 1.8 25 818
TP708-2Y(L)2Y(DSTA)2Y-100P06 100 1.8 1.8 29 1093
TP708-2Y(L)2Y(DSTA)2Y-150P06 150 1.8 2.0 34 1504
TP708-2Y(L)2Y(DSTA)2Y-200P06 200 2.0 2.0 41 2457
TP708-2Y(L)2Y(DSTA)2Y-300P06 300 2.0 2.5 48 3367
TP708-2Y(L)2Y(DSTA)2Y-400P06 400 2.5 2.8 54 4238
TP708-2Y(L)2Y(DSTA)2Y-500P06 500 2.5 2.8 59 5091
TP708-2Y(L)2Y(DSTA)2Y-600P06 600 2.8 3.2 64 5913
TP708-2Y(L)2Y(DSTA)2Y-800P06 800 3.2 3.5 72 7536
0.8mm Conductor, 1.4mm Insulated Wire
TP708-2Y(L)2Y(DSTA)2Y-10P08 10 1.5 1.5 17 332
TP708-2Y(L)2Y(DSTA)2Y-20P08 20 1.5 1.5 20 503
TP708-2Y(L)2Y(DSTA)2Y-30P08 30 1.5 1.5 23 660
TP708-2Y(L)2Y(DSTA)2Y-50P08 50 1.5 1.8 27 963
TP708-2Y(L)2Y(DSTA)2Y-70P08 70 1.8 1.8 31 1267
TP708-2Y(L)2Y(DSTA)2Y-100P08 100 1.8 2.0 37 1766
TP708-2Y(L)2Y(DSTA)2Y-150P08 150 2.0 2.5 46 3038
TP708-2Y(L)2Y(DSTA)2Y-200P08 200 2.5 2.5 51 3786
TP708-2Y(L)2Y(DSTA)2Y-300P08 300 2.8 2.8 61 5290
TP708-2Y(L)2Y(DSTA)2Y-400P08 400 2.8 3.2 68 6701
TP708-2Y(L)2Y(DSTA)2Y-500P08 500 3.2 3.5 75 8108