Telephone Cables
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Ordering Information

 Drop Wire 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

Telephone CablesTelephone Cables

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