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The drop wires are designed for extending an open wire line or distribution pairs from a pole or cable terminal to a building. The drop wires are to be installed between distribution point and telephone subscriber premises.
Conductors |
Solid cadmium copper of 0.91mm to BS 4807 (Drop Wires No. 1) |
Solid copper covered steel of 0.71mm to BS 4807 (Drop Wires No. 2) |
Solid copper covered steel of 0.81mm to BS 4807 (Drop Wires No. 6) |
Solid cadmium copper of 1.14mm to BS 4807 (Drop Wires No. 8) |
Insulation |
PVC to BS 6746 T1 (Drop Wires No. 1) |
PVC to BS 6746 T2 (Drop Wires No. 2) |
PVC to BS 7878 T1 (Drop Wires No. 6) |
PVC to BS 6746 T1 (Drop Wires No. 8) |
Cable Core Assembly: Two conductors are extruded parallel, figure-8 type. |
Nominal Conductor Diameter | mm | 0.91 | 0.71 | 0.81 | 1.14 |
BT Drop Wire Reference | No. 1 | No.2 | No.6 | No. 8 | |
Conductor Size | mm2 | 0.65 | 0.4 | 0.52 | 1.02 |
Minimum Insulation Resistance @500V DC | MΩ.km | 24 | 24 | 50 | 24 |
Minimum Insulation Thickness | mm | 0.75 | 1.02 | 0.8 | 1.52 |
Nominal Insulated Conductor Diameter | mm | 2.41 | 2.75 | 2.41 | 4.18 |
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)
Number of Cores | Minimum Insulation Thickness | Maximum Cable Dimensions Diameter X Height | Nominal Weight |
---|---|---|---|
mm | mm | kg/km | |
0.91mm Conductor, 2.41mm Insulated Wire | |||
2 | 0.75 | 2.7x5.6 | 25 |
0.71mm Conductor, 2.75mm Insulated Wire | |||
2 | 1.02 | 2.75x6.0 | 20 |
0.81mm Conductor, 2.41mm Insulated Wire | |||
2 | 0.8 | 2.5x5.4 | 23 |
1.14mm Conductor, 4.18mm Insulated Wire | |||
2 | 1.52 | 4.44x9.4 | 34 |
The Drop wire should be delivered in coils of 500 meter in length. Or as customer requirement.
Vivian Yuan