- elephone
Cable with cellular polyethylene insulation, jelly filled with petroleum
jelly and a polyethylene coating.
- For use in the Local Distribution
network.
- Insulated conductors uniformly twisted
together to form a pair.
- The water resistant filling compound is
applied to the air spaces within the cable core to provide the
water-proofnes
- Wrapping is applied over the cable
core.
- A flat aluminium foil coated with
copolymer on both sides is applied longitudinally over the core
covering as screen.
- Black linear-low density
polyethylene compound is extruded over the screen.
Physical Description
Conductors |
Solid annealed bare copper conductors
conforming to CCITT Yellow Book
Vol. III – 2-G.541 b article, IEC 28 and ASTM B3 |
Insulation |
Foam-skin
polyolen conforming to ASDM D1248 to BS 6234 Type 03 |
Cable
Assembly |
Twisted
pairs, cabled into sub-units, cabled in a circular form |
Color Code |
As
indicated below |
Filling Compound |
Water
resistant lling compound, applied to the gaps between the pairs |
Tape wrap |
Non
hygroscopic polyester tape, wrapped with 30% overlap |
Identification tape |
A suitable tape, durably marked with the
manufacturer’s name, year of manufacture
and type of cable is placed under the core covering |
Flooding compound |
Water resistant ‑flooding compound, applied
between the core wrap and the
aluminum foil |
Screen (
Shield) |
Copolymer coated aluminum foil having
thickness of 0.3mm, bonded to the
outer jacket, conforming to ASTM B736 |
Outer
Jacket |
Black PE
compound |
Mechanical
Parameters of basic conductors
Nominal Conductor Diameter (mm) |
0.63 |
Maximum Conductor Diameter (mm) |
0.64 |
Minimum Conductor Elongation, % |
15 |
Insulated Conductor diameter (mm) |
1.15 |
Insulation ultimate tensile force minimum
(N) |
3.0 |
Electrical
Properties
DC resistance @20˚C Ohm/km Maximum Average |
58 |
DC resistance @20˚C Ohm/km Maximum for 1%
of cases |
60 |
Mutual Capacitance nF/km, max Averagec |
56 |
Mutual Capacitance nF/km, max for 1% of
cases |
60 |
Pair to pair capacitance unbalance, pF max |
275 |
Insulation Resistance, 500V DC Minimum
Mohm.km |
1500 |
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