Telephone Cables

 Drop Wires No. 12, 10B, CAD55M & 10 to CW 1406, CW 1411,CW 1417 & CW 1378

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