Cable External Jellyfilled Screened Armoured 20Pr 0.5mm

Telephone 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.

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 polyethylene
Cable Assembly	Twisted pairs ,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 25% overlap
Identification tape	Manufacturer name and year of manufacture
Flooding compound	Water resistant flooding compound , applied between the core wrap and the aluminum foil
Screen ( Shield)	Two side Copolymer coated aluminum foil laid longitudinally, bonded to the outer jacket, conforming to ASTM B736. Minimum thickness of Aluminum 0.150mm
Inner Sheath	Black Low Density PE
Armouring	Galvanized steel wire armouring
Outer Sheath	Black Low Density PE
Surface Marking	Telephone symbol, length marking, telephone symbol

Nominal Conductor Diameter (mm)	0.5
Maximum Conductor Diameter (mm)	0.51
Minimum Conductor Elongation, %	15
Insulated Conductor diameter (mm)	0.9
Insulation ultimate tensile force minimum (N)	2

DC resistance @20˚C Ohm/km Maximum Average	91
DC resistance @20˚C Ohm/km Maximum for 1% of cases	96
Mutual Capacitance nF/km, max Average	53
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

Pair No	Colour of conductor insulation
	A – wire	B – wire
1	White	Blue
2	White	Orange
3	White	Green
4	White	Brown
5	White	Grey
6	Red	Blue
7	Red	Orange
8	Red	Green
9	Red	Brown
10	Red	Grey