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Telephone Cables |  |
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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 |