Telephone Cables
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Ordering Information

 Cellular PE Insulated & LAP Sheathed Air Core/Jelly Filled Cables to DIN VDE 0816

Application

The cables are designed for use as connection between central offices. The cables are suitable for installation in ducts, direct burial in the ground and also for aerial installation with integral suspension strand. Jelly filled option is for subscriber’s cables installed underground or along the edge of pavement. An armoured option is offered for direct burial installations. A figure-8 self support option is offered for aerial installation.

Standards

DIN VDE 0816

Construction

Telephone Cables

Telephone Cables

Conductors

Solid annealed bare copper 0.4/0.6/0.8mm, as per class 1 of DIN VDE 0295/ BS 6360/IEC 60228

Insulation

Cellular polyethylene 2YI2 type as per VDE 0207-2

Twisted Pairs

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

Cabling Element

Star Quads

Cable Core Assembly

4 Cores are twisted into star quad. 5 star quads are stranded into a basic unit. 5 or 10 basic units each are stranded into one main unit. The star quads are grouped in units and stranded in layers to form the cable core.Standard make up is per VDE 0816 in the 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 (0.2mm) 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

Sheath

Black low or medium density polyethylene 2YM2 type as per VDE 0207-3, 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)

Tinned copper drain wire may be longitudinally laid to ensure electrical continuity of the screen

Telephone Cables

Telephone Cables

Optional Construction

Jelly Filled Cable

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

Armoured Cable

Corrugated steel tape armour is applied over an optional inner polyethylene sheath with an overlap. An outer polyethylene sheath is applied over the armour

Type Code

A- Outdoor Cable
02Y Cellular Polyethylene (FOAM PE) insulation
Continuous core filling
(L)2Y  Laminated sheath(copolymer-coated aluminium tape laminated to PE outer sheath)
SR  Corrugated steel tape
b Armouring
Messenger of galvanized steel wires
StIII Star quad in local cables
Bd  Unit-type stranding

Electrical Properties

Nominal Conductor Diameter mm 0.4 0.6 0.8
Conductor Gauge Size AWG 26 - 20
Conductor Size mm2 0.126 0.283 0.5
Maximum Average Conductor Resistance @20°C Ω/km 143 63 34.6
Minimum Insulation Resistance @500V DC MΩ.km 5000 5000 5000
Maximum Mutual Capacitance @800Hz 95% of all values nF/km 40 40 40
                                                              100% of all values nF/km 42 42 42
Capacitance Unbalance @800Hz pair-to-pair        
         K1          100% of values max pF/500m 980 800 800
                        98% of values  max pF/500m 420 400 400
         K9-12    100% of values max pF/500m 800 300 300
                        90% of values  max pF/500m 200 100 100
Maximum Conductor Loop Resistance @20°C Ω/km 300 130 73.2
Impedance @0.8KHz 994 665 500
Maximum Average Attenuation @0.8KHz dB/km 1.45 0.91 0.68
Dielectric Strength 50Hz        
         Conductor to Conductor (2mins) V AC 500 500 500
         Conductor to Screen (2mins) V AC 2000 2000 2000
Maximum Operating Voltage Peak Value V 150 225 225
Nominal Insulation Thickness (Air Core) mm 0.20 0.25 0.3
                                                  (Jelly Filled) mm 0.26 0.36 0.44
Nominal Insulated Conductor Diameter (Air Core) mm 0.8 1.1 1.4
                                                                (Jelly Filled) mm 0.92 1.32 1.68

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

Quads
The single core is identified by black ring markings:

Side Circuit 1 a-wire without marking
  b-wire 1 mark distance 17mm
Side Circuit 2 a-wire 2 marks distance 34mm
  b-wire 2 marks distance 17mm

 

Telephone Cables

Subunits

Basic colours for the wire insulation of the 5 star quads of a basic unit:

Quad 1 Red Quad 2 Green  
Quad 3 Grey Quad 4 Yellow Quad 5 White


The tracer units are coded with a red helix, all other units by a white binder

Dimensions And Weight
Cellular PE Insulated and LAP Sheathed Air Core Cable VDE CODE: A-02Y(L)2Y …x2x0.4/0.6/0.8 StIII Bd

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