Print Friendly, PDF & Email
Cable Construction
ConductorClass 1 Solid Copper Conductor
InsulationPVC (Polyvinyl Chloride)
BeddingPET (Polyethylene Terephthalate)
SheathPVC (Polyvinyl Chloride)

Dimensions

No. of PairsNominal Diameter of Conductors mmConstructionNominal Overall Diameter mmNominal Weight kg/km
20.51 x 2PR3.518
30.51 x 3PR4.827
40.51 x 4PR5.832
60.51 x 6PR6.846
80.51 x 8PR7.658
100.5 + E1 x 10PR + E8.889
120.51 x 12PR9.185
150.51 x 15PR9.8102
160.51 x 16PR7.9101
200.5 + E1 x 20PR + E12150
250.5 + E1 x 25PR + E11.4160
300.5 + E3 x 10PR + E11.4205
320.54 x 8PR12.4200
400.5 + E4 x 10PR + E15270
500.5 + E5 x 10PR + E17330
640.5 + E1 x 16PR + 6 x 8PR + E14.8386
800.5 + E1 x 20PR + 6 x 10PR + E22.5520
1000.5 + E1 x 20PR + 8 x 10PR + E27660
1600.5 + E4 x 10PR + 6 x 20PR + E301010
3200.5 + E1 x 20PR + 5 x 20PR + 10 x 20PR + E39.51920
E. Includes additional 1.38mm diameter insulated earth wire coloured white.

 

Electrical Characteristics

Nominal Diameter of Conductors mmMinimum Insulation Resistance at 20°C
Mohms/km
Maximum Capacitance Unbalance
pF/km
0.550500
For 20 pairs and above, the maximum mutual capacitance shall increase by 3nF/km

 

Pair Identification

Cabling ElementColour Code Table CW1308
Colour of InsulationCabling ElementColour of Insulation
A - WireB - WireA - WireB - Wire
1White / BlueBlue / White16Yellow / BlueBlue / Yellow
2White / OrangeOrange / White17Yellow / OrangeOrange / Yellow
3White / GreenGreen / White18Yellow / GreenGreen / Yellow
4White / BrownBrown / White19Yellow / BrownBrown / Yellow
5White / GreyGrey / White20Yellow / GreyGrey / Yellow
6Red / BlueBlue / Red21Violet / BlueBlue / Violet
7Red / OrangeOrange / Red22Violet / OrangeOrange / Violet
8Red / GreenGreen / Red23Violet / GreenGreen / Violet
9Red / BrownBrown / Red24Violet / BrownBrown / Violet
10Red / GreyGrey / Red25Violet / GreyGrey / Violet
11Black / BlueBlue / Black26Pink / BlueBlue / Pink
12Black / OrangeOrange / Black27Pink / OrangeOrange / Pink
13Black / GreenGreen / Black28Pink / GreenGreen / Pink
14Black / BrownBrown / Black29Pink / BrownBrown / Pink
15Black / GreyGrey / Black30Pink / GreyGrey / Pink
The above table is in accordance with BT Specification CW1308

 

Make-Up and Unit Identification Colours 16 and 20 Pair Units
Pair Size8/10 Pair16/20 Pair32/40 Pair50 Pair64/80 Pair100 Pair128/160 Pair256/320 Pair
No. of Units
Center½14 x ½*5 x ½114 x ½1
1st Layer----6 x ½8 x ½65
2nd Layer-------10
Unit No.Colours of Unit Lappings
1OrangeOrangeOrangeOrangeOrangeOrangeOrangeOrange
2--GreenNaturalOrangeOrangeGreenOrange
3---GreenNaturalNaturalOrangeNatural
4----GreenNaturalNaturalNatural
5-----Green NaturalNatural
6------NaturalGreen
7------NaturalOrange
8------GreenNatural
9 to 15-------Natural
16-------Green
*½ Refers to Sub-Units of 8 or 10 pairs