Drop Wires No. 12, 10B, CAD55M & 10 to CW 1406, CW 1411, CW 1417 & CW 1378
Applications
The drop wires are designed for use in local area network to link between pole and building or two buildings. The high tensile steel strength member wires are incorporated inside the cable to provide support. The cables can be used for crossing high voltage cables up to 11kV.
Standards
- CW 1406 (Drop Wires No.12 1 pair)
- CW 1411 (Drop Wires No.10B 2 pairs)
- CW 1417 (Drop Wires CAD55M 4 pairs)
- CW 1378 (Drop Wires No.10 2 pairs)
Construction
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 |
| Conductors | Solid annealed bare copper of 0.5/0.9mm as per class 1 of BS 6360/IEC 60228. |
| Insulation | Solid low or medium density Polyethylene (CW 1406, CW 1411 & CW 1417) or Polyvinyl Chloride (CW 1378) to BS 7878. |
| Core Wrapping | 23 micron Polyester Tape. |
| Strength Member | 1 Pair: 1 element of 3 x 0.41mm brass coated steel strength member; PVC insulated to 1.4mm. 2 & 4 Pairs: 3 elements of 3 x 0.25mm brass coated steel strength member; PVC insulated to 1.0mm. |
| Sheath | Black medium density polyethylene as per BS 7878. |
| Ripcord | Nylon |
Electrical properties
| Nominal Conductor Diameter | mm | 0.9 | 0.5 | 0.5 | 0.5 |
| BT Drop Wire Reference | No.12 | No.10 | No.10B | CAD55M | |
| Standard | CW 1406 | CW 1378 | CW 1411 | CW 1417 | |
| Number of Pairs | 1 | 2 | 2 | 4 | |
| Maximum Conductor Resistance @20°C | Ω/km | 28 | 95 | 95 | 95 |
| Minimum Insulation Resistance @500V DC | MΩ.km | 10000 | 100 | 10000 | 10000 |
| Breaking Load | N | 1350-1550 | 1350-1550 | 1350-1550 | 1350-1550 |
| Maximum Mutual Capacitance @0.8KHz-3.0KHz | nF/km | - | 100 | 56 | 56 |
| Maximum Capacitance Unbalance pair-to-pair | pF/500m | - | 500 | 275 | 300 |
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 : 7.5 x Overall Diameter (unarmoured cables)
Colour code
| CW 1406 | Pair 1: Orange/White | |
| CW 1411 | Pair 1: Orange/White | Pair 2: Green/Black |
| CW 1417 | Pair 1: Orange/White | Pair 2: Red/Grey |
| Pair 3: Blue/Brown | Pair 4: Green/Black | |
| CW 1378 | Pair 1: Orange/White | Pair 2: Green/Black |
Dimensions and weight
| Cable Code | Number of Pairs | Insulation Material | Nominal Insulation Thickness | Minimum Sheath Thickness | Min/Max Overall Diameter | Nominal Weight |
|---|---|---|---|---|---|---|
| mm | mm | mm | kg/km | |||
| 0.5mm Conductor | ||||||
| TP1411-2Y2Y-2P05-DW10B | 2 | PE | 0.2 | 0.4 | 5.1/5.6 | 32 |
| TP1417-2Y2Y-4P05-DW55M | 4 | PE | 0.2 | 0.5 | 5.3/5.5 | 35 |
| TP1378-Y2Y-2P05-DW10 | 2 | PVC | 0.2 | 0.4 | 5.3/5.5 | 33 |
| 0.9mm Conductor | ||||||
| TP1406-2Y2Y-1P09-DW12 | 1 | PE | 0.3 | 0.5 | 5.0/5.5 | 32 |
