Telephone Cables
Outdoor Telephone Cables
Indoor Telephone Cables
Indoor/Outdoor Telephone Cables
Special Telephone Cables

Ordering Information

 Solid PE Insulated & AP Sheathed Air Core Cables to ICEA S-85-625

Application

The cables are designed for use as subscriber distribution cables and as connection between central offices. The cables are suitable for installation in ducts and aerial installation with integral suspension strand. A figure-8 self support option is offered for aerial installation.

Standards

• ICEA S-85-625(formerly RUS (REA) PE-22 & RUS (REA) PE-38)

Construction

Telephone Cables   

Telephone Cables

Conductors
Solid annealed bare copper, 0.4/0.5/0.63/0.9mm, as per ASTM B-3/class 1 of IEC 60228

Insulation
Solid polyethylene as per ASTM D 1248/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 of 25 pairs or less are assembled into cylindrical core. Cables larger than 25 pairs are assembled into units, which are then used to form the core. 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
A layer of corrugated copolymer coated aluminium tape (0.2mm/8mil) is 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 or medium density polyethylene as per ASTM D 1248/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 provided for large pair cables

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

Optional Construction

Self-Support Cables
A 7-strand galvanized steel strand is used as 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

0.63

0.9

Conductor Gauge Size

AWG

26

24

22

19

Maximum Average DC Resistance

Ω/km / Ω/mile

140/225

87/140

55/88.6

27.0/43.4

Maximum Individual DC Resistance

Ω/km / Ω/mile

144.2/232

89.5/144

56.5/91.0

28.0/45.0

Minimum Insulation Resistance @500V DC

MΩ.km / MΩ.mile

1600/1000

1600/1000

1600/1000

1600/1000

Maximum Average Resistance Unbalance

%

1.5

1.5

1.5

1.5

Maximum Individual Resistance Unbalance

%

5

5

5

5

Average Mutual Capacitance nF/km / nF/kft 48.5-54.0
/14.8-16.5		 48.5-54.0
/14.8-16.5		 48.5-54.0
/14.8-16.5		 48.5-54.0
/14.8-16.5
Maximum Individual Mutual Capacitance nF/km / nF/kft 57/17.4 57/17.4 57/17.4 57/17.4
Maximum Individual Capacitance Unbalance pair-to-pair pF/km / pF/kft 145/44 145/44 145/44 145/44
Capacitance Unbalance RMS pair-to-pair pF/km / pF/kft 45/13.7 45/13.7 45/13.7 45/13.7
Maximum Individual Capacitance Unbalance pair-to-ground pF/km / pF/kft 2625/800 2625/800 2625/800 2625/800
Maximum Average Capacitance Unbalance pair-to-ground pF/km / pF/kft 574/175 574/175 574/175 574/175
Maximum Conductor Loop Resistance @20°C Ω/km / Ω/mile 300/482 192/309 114/183.6 60/96.4
Impedance @1KHz Ω 994 796 660 445
Impedance @100KHz Ω 147 134 125 122
Impedance @512KHz Ω 120 118 117 116
Impedance @1MHz Ω 117 115 114 113
Maximum Average Attenuation @0.8KHz dB/km / dB/kft 1.64/0.5 1.30/0.39 1.04/0.32 0.74/0.22
Maximum Average Attenuation @1KHz dB/km / dB/kft 1.68/0.51 1.35/0.41 1.08/0.33 0.76/0.23
Maximum Average Attenuation @3KHz dB/km / dB/kft 3.18/0.97 2.52/0.77 2.01/0.61 1.42/0.43
Maximum Average Attenuation @150KHz dB/km / dB/kft 11.4/3.47 8.3/2.53 6.2/1.89 4.4/1.34
Maximum Average Attenuation @772KHz dB/km / dB/kft 24.3/7.4 19.4/5.9 15.4/4.7 10.8/3.3
Maximum Average Attenuation @1000KHz dB/km / dB/kft 27.1/8.25 21.4/6.52 17.5/5.33 12.8/3.89
Dielectric Strength          
      Conductor to Conductor (3secs) V DC 2400 3000 4000 5000
      Conductor to Screen (3secs) V DC 10000 10000 10000 10000
Minimum EL Far-end Cross-talk-Mean Power Sum          

      @150KHz

 dB/305m / dB/kft 61 63 63 65

      @772KHz

 dB/305m / dB/kft 47 49 49 57

      @1.6MHz

 dB/305m / dB/kft 41 42 43 44

      @3.15MHz

 dB/305m / dB/kft 35 37 37 39

      @6.3MHz

 dB/305m / dB/kft 29 31 31 33
Minimum Far-end Cross-talk-Worst Pair Power Sum          

      @150KHz

 dB/305m / dB/kft 57 57 57 59

      @772KHz

 dB/305m / dB/kft 43 43 43 45

      @1.6MHz

 dB/305m / dB/kft 37 37 37 39

      @3.15MHz

 dB/305m / dB/kft 31 31 31 33

      @6.3MHz

 dB/305m / dB/kft 25 25 25 27
Minimum Near-end Cross-talk-Mean Power Sum          

      @150KHz

 dB/305m / dB/kft 58 58 58 58

      @772KHz

 dB/305m / dB/kft 47 47 47 47

      @1.6MHz

 dB/305m / dB/kft 43 43 43 43

      @3.15MHz

 dB/305m / dB/kft 38 38 38 38

      @6.3MHz

 dB/305m / dB/kft 34 34 34 34
Minimum Near-end Cross-talk-Worst Pair Power Sum          

      @150KHz

dB/305m / dB/kft

53

53

53

53

      @772KHz

dB/305m / dB/kft

42

42

42

42

      @1.6MHz

dB/305m / dB/kft

38

38

38

38

      @3.15MHz

dB/305m / dB/kft

33

33

33

33

      @6.3MHz

dB/305m / dB/kft

29

29

29

29

Nominal Insulation Thickness

mm

0.15

0.2

0.26

0.3

Nominal Insulated Conductor Diameter

mm

0.7

0.9

1.15

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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