Norden Internal Multi-pair Telephone cables are manufactured in accordance with BT type CW 1308. These cables are used for connecting telephone systems and data exchange systems with a plain annealed copper conductor of 0.4mm, 0.5mm, 0.6mm &; 0.9mm diameter with PVC insulation. These are twisted to form a pair and over sheathed in white, cream, gray &; black PVC. A rip cord is laid under the sheath to facilitate its removal. An optional 1.38mm diameter earth copper wire is available on 50 pair cables and above.
Overview Specifications Ordering Information
![]() |
CABLE STANDARDCW 1308 INTERNAL TELEPHONE CABLE |
Conductor |
Class 1 Solid annealed Bare Copper Conductors to BS 6360 |
Insulation |
PVC (Polyvinyl Chloride) |
Twisted Pair |
Two single wires are twisted to form a Pair |
No. of Twist/mtr |
16 (Avg.) |
Separator |
Polyester Tape longitudinal wrapped |
Rip Cord |
Nylon |
Earth Wire |
PVC insulated Bare Copper |
Outer Jacket |
PVC & LSZH (Optional) |
Jacket Colour |
Cream |
Characteristic | Value | |||
0.4 mm | 0.5 mm | 0.63 mm | 0.9 mm | |
Conductor Size |
26 AWG |
24 AWG |
22 AWG |
19 AWG |
Nom. Insulation Thickness |
0.15 mm |
0.15 mm |
0.25 mm |
0.30 mm |
Nom. Insulated Conductor Diameter |
0.75±0.05 mm |
0.85±0.05 mm |
1.13 mm |
1.50 mm |
Earth Wire Diameter | 1.38 mm | |||
Min. Bending Radius |
4 x D |
|||
Max. Tensile Load (Installation) | No. of Pairs X 100 N | |||
Operating Temperature | -20°C to +75°C | |||
Installation Temperature | -20°C to +50°C |
Characteristic | Unit | Value | |||
0.4 mm | 0.5 mm | 0.63 mm | 0.9 mm | ||
Max. Conductor DC Resistant @ 20 °C | Ω/km |
153 |
97.8 |
65 |
21 |
Max. Capacitance Unbalance @ 800 Hz (Pair to Pair) | pF/500m |
300 |
500 |
600 |
275 |
Min. Insulation Resistant at 500 VDC | MΩ.km | 50 | |||
Dielectric Strength between Pairs | KV/min | 1.0 |
Pair No. | Wire - A Colour | Wire - B Colour | Pair No. | Wire A - Colour | Wire - B Colour |
1 |
White/Blue |
Blue/White |
14 |
Black /Brown |
Brown/Black |
2 |
White/Orange |
Orange/White |
15 |
Black /Grey |
Grey/Black |
3 |
White/Green |
Green/White |
16 |
Yellow /Blue |
Blue/ Yellow |
4 |
White/Brown |
Brown/White |
17 |
Yellow /Orange |
Orange/ Yellow |
5 |
White/Grey |
Grey/White |
18 |
Yellow /Green |
Green/ Yellow |
6 |
Red/Blue |
Blue/Red |
19 |
Yellow /Brown |
Brown/ Yellow |
7 |
Red /Orange |
Orange/Red |
20 |
Yellow /Grey |
Grey/ Yellow |
8 |
Red /Green |
Green/Red |
21 |
Violet /Blue |
Blue/ Violet |
9 |
Red /Brown |
Brown/Red |
22 |
Violet /Orange |
Orange/ Violet |
10 |
Red /Grey |
Grey/Red |
23 |
Violet /Green |
Green/ Violet |
11 |
Black /Blue |
Blue/Black |
24 |
Violet /Brown |
Brown/ Violet |
12 |
Black /Orange |
Orange/Black |
25 |
Violet /Grey |
Grey/ Violet |
13 |
Black /Green |
Green/Black |