Telephone Cables

 PE Insulated & PE Sheathed Non Metallic Reinforced Drop Wires to RUS (REA) PE-7

Application

The drop wires are one or two pair aerial service wires designed for use in extending telephone service to subscriber premises from the cable terminal.

Standards

• RUS (REA) PE-7

Construction

Conductors
Solid annealed bare copper 0.5/0.8mm as per ASTM B-3/IEC 60228 Class 1

Insulation
Solid polyethylene as per ASTM D 1248/IEC 60708

Cable Core Assembly & Core Wrapping
Individual conductors are twisted into pairs and wrapped with PETP tape

Strength Member:
Aramid yarn as non-metallic strength member is placed inside the sheath to provide longitudinal strength

Sheath
PE is extruded over the core to provide protection against mechanical damage, degradation by sunlight and water ingress

Ripcord
A ripcord made of polyamide is placed parallel to the core to facilitate sheath removal

Electrical Properties

Conductor Diameter

mm

0.5

0.8

Conductor Gauge Size

AWG

24

20

Maximum Conductor Resistance @20°C

Ω/km / Ω/mile

91/145.78

34.6/55.72

Minimum Insulation Resistance @500V DC

MΩ.km / MΩ.mile

10000/6214

10000/6214

Maximum Resistance Unbalance

%

2

2

Average Mutual Capacitance @1000Hz

nF/km / nF/kft

55/16.8

55/16.8

Maximum Capacitance Unbalance pair-to-pair

pF/km / pF/kft

300/91

300/91

Maximum Capacitance Unbalance pair-to-ground

pF/km / pF/kft

1000/303.4

1000/303.4

Impedance @0.8KHz

Ω/km / Ω/mile

600/965.6

600/965.6

Impedance @64KHz

Ω/km / Ω/mile

125/201.2

125/201.2

Impedance @772KHz

Ω/km / Ω/mile

100/160.9

100/160.9

Maximum Average Attenuation @0.8KHz

Ω/km / Ω/mile

1.5/2.4

1.5/2.4

Maximum Average Attenuation @64KHz

Ω/km / Ω/mile

8.0/12.87

8.0/12.87

Maximum Average Attenuation @772KHz

Ω/km / Ω/mile

18/28.97

18/28.97

Dielectric Strength 1min

V

1000DC/1500AC

1000DC/1500AC

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

Color Code

  A wire B wire
1 PR White Blue
1 PR Yellow Black

 

 

Dimensions And Weight

Cable Code Number of Pairs Insulation Thickness
mm/inch
Sheath
Thickness
mm/inch
Nominal Overall
Diameter
mm/inch
Nominal Weight
kg/km / lbs/kft
0.5mm Conductor, 0.9mm Insulated Wire
TP7-2Y2Y-2P05-SS-A 2 0.2/0.0079 1.2/0.047 5.0/0.197 26.2/17.6
0.8mm Conductor, 1.36mm Insulated Wire
TP7-2Y2Y-1P08-SS-A 1 0.28/0.0110 1.2/0.047 5.3/0.209 26.6/17.9