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Cable construction

ConductorClass 5 flexible tinned copper conductor according to BS EN 60228 (previously BS 6360)
Insulation4A, 4C: EPR-HOFR (Ethylene Propylene Rubber - Heat and Oil Resistant and Flame Retardant) Type FR1 according to BS 7655
4D, 4E, 4F: EPR-HOFR (Ethylene Propylene Rubber - Heat and Oil Resistant and Flame Retardant) Type FR2 according to BS 7655
BeddingPET (Polyester Type)
SheathCPE (Chlorinated Polyethylene) rubber compound

Dimensions - Coil End Lead TYPE 4 BS 6195 Cable

No. of CoresNominal Cross Sectional Area mm²Nominal Thickness of Insulation mmNominal Overall Diameter mmNominal Weight kg/km
Coil End Lead Type 4A Cable - 300/500V
11.50.8429
12.50.94.642
1415.461
1616.588
1101.27.9141
Coil End Lead Type 4C Cable - 600/1000V
1101.58.5130
1161.59.6190
1251.68.5290
1351.612.8380
1501.714.8510
1701.817.2750
195219.7935
11202.221.91160
11502.324.11450
11852.426.31770
12402.428.32260
13002.6332760
14002.837.43880
15003.2384650
16303.3436220
Coil End Type 4D Cable - 1.9/3.3kV
12.52.88.5100
142.89.1115
162.810.3141
1102.811.3216
1162.812.4288
1252.813.8392
1352.815.2509
1502.817.1682
1702.819.2894
1953221168
1120323.51433
1150325.51734
1185327.52073
1240330.62657
1300333.83279
1400337.84229
Coil End Type Lead 4E Cable - 3.8/6.6kV
116517.2408
125518.6527
135520656
150522.1832
170524.21053
195526.31304
1120527.81634
1150529.81894
1185532.12242
1240535.12842
Coil End Type 4F Cable - 6.35/11kV
1257.624.1764
1357.625.5911
1507.627.31114
1707.629.41344
1957.631.51610
11207.633.31919
11507.635.32248
11857.637.32616
12407.640.33252

Class 5 Flexible Copper Conductors for Single Core and Multi-Core Cables
Nominal Cross
Sectional Area mm²
Maximum Diameter of Wires in Conductor mmMaximum Resistance
of Conductor At 20ºC
Plain Wires ohms/km
1.50.2613.3
2.50.267.98
40.314.95
60.313.3
100.411.91
160.411.21
250.410.78
350.410.554
500.410.386
700.510.272
950.510.206
1200.510.161
1500.510.129
1850.510.106
2400.510.0801
3000.510.0641
4000.510.0486
5000.610.0384
6300.610.0287

Current Carrying Capacity in Free Air
Nominal Cross
Sectional Area mm²
Maximum Continuous Current Rating
Single Cable
Amps
2 Cables Bunched
Amps
3 Cables Bunched
Amps
1.5-2522
2.5-3430
4-4641
6-5853
10-8073
16-10897
25166147128
35206182160
50250220197
70321282254
95391343311
120455398364
150525459422
185602523485
240711618577
300821713670
400989855790
5001140986908
630132311411047

De-Rating Factors
Ambient Temperature °C
253035404550556065
DE-RATING FACTOR1.141.091.051.000.950.900.840.770.71

Ambient temperature: 40ºC
Conductor operating temperature: 90ºC

Notes
The current-carrying capacities in this appendix are based upon the following reference ambient temperatures:
1. For non-sheathed and sheathed cables in air, regardless of the installation method: 30ºC
2. For buried cables, either directly in the soil or in ducts in the ground: 20ºC

The current rating shown are based on conservative assumptions, and therefore, in some instances, may be adjusted according to the ambient installation and operating conditions.

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