Telephone Cable | Cables Britain

CW1308

The following range of multipair internal telephone cables are manufactured in accordance with BT type CW 1308.

They are constructed from a 0.5mm tinned copper conductor, which is PVC insulated, these cores are twisted into pairs and the required number of pairs are then laid up in either layers for cables containing up to and including 25 pairs, or in units for items of 32 pairs and above. The pairs are colour coded for ease of identification. An earth conductor of 1.38mm PVC insulated plain copper is included where shown. The cables are either black or white with a PVC or LSOH outer sheath (CW1308B) For colour code details please refer to table below. Foil shielded versions are available in certain pair sizes.

Cable construction

No of Pairs (mm)	Construction	Max O.D. (mm)	No Of Pairs	Construction	Max O.D.
2	L	3.6	20 + Earth	1 x 20U	12.0
3	L	4.5	25	L	11.4
4	L	5.8	25 + Earth	L	12.0
6	L	6.8	# 32 + Earth	2 x 16U	16.0
10	L	8.3	40 + Earth	2 x 40U	15.0
10 + Earth	1/2 x 20U	8.6	50 + Earth	21/2 x 20U	17.5
12	L	9.1	60 + Earth	3 x 20U	20.0
12 + Earth	L	9.5	80 + Earth	4 x 20U	22.5
15	L	9.8	100 + Earth	5 x 20U	24.0
*20	L	10.7	160 + Earth	8 x 20U	30.3

CONSTRUCTION
L = Layer Construction
U = Unit Construction
* = This item contains an additional conductor coloured violet.
# = Each unit in this item is divided into sub units, the first containing elements 1-4 and 6-9, the second 11-14 and 16-19.

Electrical characteristics

Minimum Insulation Resistance @ 20 C	50 MEGA OHMS/KM
Maximum Conductor Resistance @ 20 C	97.8 OHMS/KM
Maximum Capacitance Unbalance	500pf

Colour Coding Table

Pair No.	Colour Of Insulation A - Wire	Colour Of Insulation B - Wire
1 Yellow	WHITE-Blue	BLUE-White
2 Yellow	WHITE-Orange	ORANGE-White
3 Yellow	WHITE-Green	GREEN-White
4 Yellow	WHITE-Brown	BROWN-White
5 Yellow	WHITE-Grey	GREY-White
6 Violet	RED-Blue	BLUE-Red
7 Violet	RED-Orange	ORANGE-Red
8 Violet	RED-Green	GREEN-Red
9 Violet	RED-Brown	BROWN-Red
10 Violet	RED-Grey	GREY-Red
11 Pink	BLACK-Blue	BLUE-Black
12 Pink	BLACK-Orange	ORANGE-Black
13 Pink	BLACK-Green	GREEN-Black
14 Pink	BLACK-Brown	BROWN-Black
15 Pink	BLACK-Grey	GREY-Black
16 Yellow	YELLOW-Blue	BLUE-Yellow
17 Yellow	YELLOW-Orange	ORANGE-Yellow
18 Yellow	YELLOW-Green	GREEN-Yellow
19 Yellow	YELLOW-Brown	BROWN-Yellow
20 Yellow	YELLOW-Grey	GREY-Yellow
21 Violet	VIOLET-Blue	BLUE-Violet
22 Violet	VIOLET-Orange	ORANGE-violet
23 Violet	VIOLET-Green	GREEN-Violet
24 Violet	VIOLET-Brown	BROWN-Violet
25 Violet	VIOLET-Grey	GREY-Violet
26 Pink	PINK-Blue	BLUE-Pink
27 Pink	PINK-Orange	ORANGE-Pink
28 Pink	PINK-Green	GREEN-Pink
29 Pink	PINK-Brown	BROWN-Pink
30 Pink	PINK-Grey	GREY-Pink

While every care is taken to ensure that the information contained in this data is correct, no legal responsibility can be accepted for any inaccuracy. The Company reserves the right to alter or modify the information contained herein at any time in the light of other developments.

Our digital coaxial cables have many accessories. For more information, don’t hesitate to call us on 0121 508 6890 or get in touch via Contact Page.

`Data Cable`

Data Cable

Posted in Communication | Comments Off on Data Cable

`Telephone Cables`

Posted in Communication | Comments Off on Telephone Cables

`Network Cable`

Posted in Communication | Comments Off on Network Cable

`RG Coaxial Cable`

High quality RG Type Coaxial cables, 50 or 75 Ohm is suitable for many applications, including low power video, video signal, and broadband signals. A broad selection available in Duct Grade or LSZH versions.

Posted in Communication | Comments Off on RG Coaxial Cable

`Digital Satellite Coaxial Cable`

Posted in Communication | Comments Off on Digital Satellite Coaxial Cable

`URM Coaxial Cable`

High quality URM Type Coaxial cables, 50 or 75 Ohm is suitable for many applications, including low power video, video signal, and broadband signals.

Posted in Communication | Comments Off on URM Coaxial Cable

`2 x CB63R`

Digital satellite coaxial cable.

Posted in Communication, Digital Satellite Coaxial Cable | Comments Off on 2 x CB63R

`Bus Cable`

Bus Cable

Posted in Communication, Network Cable | Comments Off on Bus Cable

`Local Area Network Cable`

Posted in Communication, Network Cable | Comments Off on Local Area Network Cable

`CB10R`

Digital satellite coaxial cable.

Posted in Communication, Digital Satellite Coaxial Cable | Comments Off on CB10R

`C0125R`

Digital satellite coaxial cable.

Posted in Communication, Digital Satellite Coaxial Cable | Comments Off on C0125R

`C0165R`

Digital satellite coaxial cable.

Posted in Communication, Digital Satellite Coaxial Cable | Comments Off on C0165R

`AS-I BUS Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on AS-I BUS Cable

`Profinet Type A Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profinet Type A Cable

`Profibus PA PVC Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus PA PVC Cable

`Profibus PA FRNC-LSZH Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus PA FRNC-LSZH Cable

`CW1308`

Internal telephone cables.

Posted in Communication, Telephone Cable | Comments Off on CW1308

`CW1308 Internal Telecom Cable`

Posted in Communication, Telephone Cable | Comments Off on CW1308 Internal Telecom Cable

`CW1308B Internal/External LSZH Telecom Cable`

Posted in Communication, Telephone Cable | Comments Off on CW1308B Internal/External LSZH Telecom Cable

`CW1128 External Telephone Cable`

Posted in Communication, Telephone Cable | Comments Off on CW1128 External Telephone Cable

`KNX/EIB Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on KNX/EIB Cable

`Profibus PA LSZH SWB Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus PA LSZH SWB Cable

`Profibus DP LSZH SWB Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus DP LSZH SWB Cable

`Profinet PUR Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profinet PUR Cable

`CAT 5E`

Internal telephone cables.

Posted in Local Area Network Cable, Communication | Comments Off on CAT 5E

`Cat 5E 25 Pair U/UTP PE Duct Grade Cable`

  Posted in Local Area Network Cable, Communication, Network Cable  |  Comments Off on Cat 5E 25 Pair U/UTP PE Duct Grade Cable

`Cat 5E 25 Pair U/UTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E 25 Pair U/UTP LSZH Cable

`Cat 5E F/UTP PVC Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E F/UTP PVC Cable

`Profibus DP FC L2/FIP PVC Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus DP FC L2/FIP PVC Cable

`Profibus DP FC L2/FIP LSZH Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on Profibus DP FC L2/FIP LSZH Cable

`DeviceNet Thick FRNC LSZH Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on DeviceNet Thick FRNC LSZH Cable

`DeviceNet Thin LSZH Cable`

Posted in Communication, Network Cable, Bus Cable | Comments Off on DeviceNet Thin LSZH Cable

`Cat 5E U/UTP PVC Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E U/UTP PVC Cable

`Cat 5E U/UTP PE External Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E U/UTP PE External Cable

`Cat 5E F/UTP PE Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E F/UTP PE Cable

`Cat 5E F/UTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E F/UTP LSZH Cable

`Cat 5E PE F/UTP GSWB LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E PE F/UTP GSWB LSZH Cable

`Cat 5E U/UTP SWA LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E U/UTP SWA LSZH Cable

`Cat 5E U/UTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 5E U/UTP LSZH Cable

`Cat 6 F/UTP PE Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 6 F/UTP PE Cable

`Cat 6 U/UTP PE Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 6 U/UTP PE Cable

`Cat 6 U/UTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 6 U/UTP LSZH Cable

`Cat 6A U/FTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 6A U/FTP LSZH Cable

`Cat 6 F/UTP LSZH Cable`

Posted in Local Area Network Cable, Communication, Network Cable | Comments Off on Cat 6 F/UTP LSZH Cable

`C0220R`

Digital satellite coaxial cable.

Posted in Communication, Digital Satellite Coaxial Cable | Comments Off on C0220R

Conductor	Class 1 Solid Copper Conductor
Insulation	PVC (Polyvinyl Chloride)
Bedding	PET (Polyethylene Terephthalate)
Sheath	PVC (Polyvinyl Chloride)

Dimensions

No. of Pairs	Nominal Diameter of Conductors mm	Construction	Nominal Overall Diameter mm	Nominal Weight kg/km
2	0.5	1 x 2PR	3.5	18
3	0.5	1 x 3PR	4.8	27
4	0.5	1 x 4PR	5.8	32
6	0.5	1 x 6PR	6.8	46
8	0.5	1 x 8PR	7.6	58
10	0.5 + E	1 x 10PR + E	8.8	89
12	0.5	1 x 12PR	9.1	85
15	0.5	1 x 15PR	9.8	102
16	0.5	1 x 16PR	7.9	101
20	0.5 + E	1 x 20PR + E	12	150
25	0.5 + E	1 x 25PR + E	11.4	160
30	0.5 + E	3 x 10PR + E	11.4	205
32	0.5	4 x 8PR	12.4	200
40	0.5 + E	4 x 10PR + E	15	270
50	0.5 + E	5 x 10PR + E	17	330
64	0.5 + E	1 x 16PR + 6 x 8PR + E	14.8	386
80	0.5 + E	1 x 20PR + 6 x 10PR + E	22.5	520
100	0.5 + E	1 x 20PR + 8 x 10PR + E	27	660
160	0.5 + E	4 x 10PR + 6 x 20PR + E	30	1010
320	0.5 + E	1 x 20PR + 5 x 20PR + 10 x 20PR + E	39.5	1920

E. Includes additional 1.38mm diameter insulated earth wire coloured white.

Electrical Characteristics

Nominal Diameter of Conductors mm	Minimum Insulation Resistance at 20°C Mohms/km	Maximum Capacitance Unbalance pF/km
0.5	50	500

For 20 pairs and above, the maximum mutual capacitance shall increase by 3nF/km

Pair Identification

Cabling Element	Colour Code Table CW1308
	Colour of Insulation		Cabling Element	Colour of Insulation
	A - Wire	B - Wire		A - Wire	B - Wire
1	White / Blue	Blue / White	16	Yellow / Blue	Blue / Yellow
2	White / Orange	Orange / White	17	Yellow / Orange	Orange / Yellow
3	White / Green	Green / White	18	Yellow / Green	Green / Yellow
4	White / Brown	Brown / White	19	Yellow / Brown	Brown / Yellow
5	White / Grey	Grey / White	20	Yellow / Grey	Grey / Yellow
6	Red / Blue	Blue / Red	21	Violet / Blue	Blue / Violet
7	Red / Orange	Orange / Red	22	Violet / Orange	Orange / Violet
8	Red / Green	Green / Red	23	Violet / Green	Green / Violet
9	Red / Brown	Brown / Red	24	Violet / Brown	Brown / Violet
10	Red / Grey	Grey / Red	25	Violet / Grey	Grey / Violet
11	Black / Blue	Blue / Black	26	Pink / Blue	Blue / Pink
12	Black / Orange	Orange / Black	27	Pink / Orange	Orange / Pink
13	Black / Green	Green / Black	28	Pink / Green	Green / Pink
14	Black / Brown	Brown / Black	29	Pink / Brown	Brown / Pink
15	Black / Grey	Grey / Black	30	Pink / Grey	Grey / Pink

The above table is in accordance with BT Specification CW1308

Make-Up and Unit Identification Colours 16 and 20 Pair Units
Pair Size	8/10 Pair	16/20 Pair	32/40 Pair	50 Pair	64/80 Pair	100 Pair	128/160 Pair	256/320 Pair
No. of Units
Center	½	1	4 x ½*	5 x ½	1	1	4 x ½	1
1st Layer	-	-	-	-	6 x ½	8 x ½	6	5
2nd Layer	-	-	-	-	-	-	-	10
Unit No.	Colours of Unit Lappings
1	Orange	Orange	Orange	Orange	Orange	Orange	Orange	Orange
2	-	-	Green	Natural	Orange	Orange	Green	Orange
3	-	-	-	Green	Natural	Natural	Orange	Natural
4	-	-	-	-	Green	Natural	Natural	Natural
5	-	-	-	-	-	Green	Natural	Natural
6	-	-	-	-	-	-	Natural	Green
7	-	-	-	-	-	-	Natural	Orange
8	-	-	-	-	-	-	Green	Natural
9 to 15	-	-	-	-	-	-	-	Natural
16	-	-	-	-	-	-	-	Green

*½ Refers to Sub-Units of 8 or 10 pairs

CW1308B Internal/External LSZH Telecom Cable

Communication, Telephone Cable

Cable Construction

Conductor	Class 1 Solid Copper Conductor according to BS EN 60228 (previously BS 6360)
Insulation	PVC (Polyvinyl Chloride)
Bedding	Polyester Wrapping Tape
Screen	AL/PE (Aluminium / Polyethylene) Tape
Sheath	LSZH (Low Smoke Zero Halogen)

Dimensions

No. of Pairs	Nominal Diameter of Conductors mm	Construction	Nominal Overall Diameter mm	Nominal Weight kg/km
10	0.5 + E	20PR Unit	7	98
20	0.5 + E	20PR Unit	9	155
50	0.5 + E	20PR Unit	13.5	325
75	0.5 + E	20PR Unit	16	470
80	0.5 + E	20PR Unit	16.5	495
100	0.5 + E	20PR Unit	19	610
200	0.5 + E	20PR Unit	25.6	1155

E. Includes additional 1.38mm diameter insulated earth wire coloured white

Electrical Characteristics

Maximum Resistance of Conductor at 20°C ohms/km	Minimum Insulation Resistance at 20°C Mohms/km	Maximum Capacitance Unbalance pF/km
97.8	50	500

Pair Identification

Cabling Element	Colour Code Table CW1308
	Colour of Insulation		Cabling Element	Colour of Insulation
	A - Wire	B - Wire		A - Wire	B - Wire
1	White / Blue	Blue / White	16	Yellow / Blue	Blue / Yellow
2	White / Orange	Orange / White	17	Yellow / Orange	Orange / Yellow
3	White / Green	Green / White	18	Yellow / Green	Green / Yellow
4	White / Brown	Brown / White	19	Yellow / Brown	Brown / Yellow
5	White / Grey	Grey / White	20	Yellow / Grey	Grey / Yellow
6	Red / Blue	Blue / Red	21	Violet / Blue	Blue / Violet
7	Rec / Orange	Orange / Red	22	Violet / Orange	Orange / Violet
8	Red / Green	Green / Red	23	Violet / Green	Green / Violet
9	Red / Brown	Brown / Red	24	Violet / Brown	Brown / Violet
10	Red / Grey	Grey / Red	25	Violet / Grey	Grey / Violet
11	Black / Blue	Blue / Black	26	Pink / Blue	Blue / Pink
12	Black / Orange	Orange / Black	27	Pink / Orange	Orange / Pink
13	Black / Green	Green / Black	28	Pink / Green	Green / Pink
14	Black / Brown	Brown / Black	29	Pink / Brown	Brown / Pink
15	Black / Grey	Grey / Black	30	Pink / Grey	Grey / Pink

The above table is in accordance with CW1308

Make-Up and Unit Identification Colours 16 and 20 Pair Units
Pair Size	8/10 Pair	16/20 Pair	32/40 Pair	64/80 Pair	100 Pair	128/160 Pair	256/320 Pair
No. of Units
Center	½	1	4 x ½*	1	1	4 x ½	1
1st Layer	-	-	-	6 x ½	8 x ½	6	5
2nd Layer	-	-	-	-	-	-	10
Unit No.	Colours of Unit Lappings
1	Orange	Orange	Orange	Orange	Orange	Orange	Orange
2	-	-	Green	Orange	Orange	Green	Orange
3	-	-	-	Natural	Natural	Orange	Natural
4	-	-	-	Green	Natural	Natural	Natural
5	-	-	-	-	Green	Natural	Natural
6	-	-	-	-	-	Natural	Green
7	-	-	-	-	-	Natural	Orange
8	-	-	-	-	-	Green	Natural
9 to 15	-	-	-	-	-	-	Natural
16	-	-	-	-	-	-	Green

*½ Refers to Sub-Units of 8 or 10 pairs.

CW1128 External Telephone Cable

Communication, Telephone Cable

Cable Construction

Conductor	Class 1 Solid Annealed Copper Conductor according to BS EN 60228 (previously BS 6360) resistance to CW Specification
Insulation	CEL-PE (Cellular Polyethylene)
Bedding	Clupak Paper Tape (with rip cord)
Filler	Petroleum Jelly
Sheath	PE (Polyethylene)

Dimensions
CW1128 1/0.5 PJ Filled Unarmoured

No. of Pairs	Nominal Diameter of Conductors mm²	Pair Configuration	Nominal Overall Diameter mm	Nominal Weight kg/km
2	0.5	1 Quad	7.5	50
5	0.5	1 x 5 Pairs	8	53
10	0.5	1 x 10 Pairs	9.5	79
20	0.5	4 x 5 Pairs	12	141
50	0.5	5 x 10 Pairs	16.5	310
100	0.5	10 x 10 Pairs	22	578

Electrical Characteristics
CW1128 1/0.5 PJ Filled Unamoured

Nominal Diameter of Conductors mm	Maximum Resistance of Conductor at 20°C ohms/km	Minimum Insulation Resistance at 20°C Mohms/km	Maximum Mutual Capacitance nF/km
0.5	96	1500	64

CW1128/1198 External Direct Burial Telephone Cable

Communication, Telephone Cable

Cable Construction

Conductor	Class 1 Solid Annealed Copper Conductor according to BS EN 60228 (previously BS 6360) Resistance to CW Specification
Insulation	CEL-PE (Cellular Polyethylene)
Bedding	PE (Polyethylene) according to BS 50290-1
Filler	Petroleum Jelly
Separator	Clupak Paper Tape (with rip cord)
Armour	GSWA (Galvanised Steel Wire Armour)
Sheath	PE (Polyethylene)

Dimensions

No. of Pairs	Nominal Diameter of Conductors mm	Pair Configuration	Diameter Under Armour mm	Armour Diameter mm	Nominal Overall Diameter mm	Nominal Weight kg/km
2	0.5	1 Quad	7.5	0.9	12.7	191
2	0.9	1 Quad	9	0.9	14.2	308
5	0.5	1 x 5 Pairs	8	0.9	13.2	218
5	0.9	1 x 5 Pairs	11.5	0.9	16.7	379
10	0.5	1 x 10 Pairs	9.5	0.9	14.7	259
10	0.9	1 x 10 Pairs	14	1.25	19.9	605
20	0.5	4 x 5 Pairs	12	0.9	17.2	358
20	0.9	4 x 5 Pairs	18	2	24.8	1065
30	0.5	3 x 10 Pairs	12.5	1.25	18.4	530
30	0.9	3 x 10 Pairs	19.3	2	26.1	1424
50	0.5	5 x 10 Pairs	16.5	2	23.3	851
50	0.9	5 x 10 Pairs	26.5	2	34.5	2142
100	0.5	10 x 10 Pairs	22	2	29	1265
100	0.9	10 x 10 Pairs	36	2	43.4	2620

Electrical Characteristics

Nominal Diameter of Conductors mm	Maximum Resistance of Conductor at 20°C ohms/km	Minimum Insulation Resistance Mohms/km	Maximum Mutual Capacitance nF/km
0.5	96	1500	64
0.9	30	1500	65

For 20 pairs and above, the maximum mutual capacitance shall increase by 3nF/km

Search Cables Britain

Get In Touch

Cable Types

Recent Posts