Application
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
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
Color 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
mm |
Minimum Sheath
Thickness
mm |
Min/Max Overall
Diameter
mm |
Nominal
Weight
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 |
