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Cable construction

ConductorClass 2 stranded copper conductor according to BS EN 60228
InsulationXLPE (Cross-Linked Polyethylene)
BeddingPVC (Polyvinyl Chloride)
ArmourSWA (Steel Wire Armour)
SheathPVC (Polyvinyl Chloride)

Dimensions - BS5467 XLPE/PVC/AWA/PVC (Copper)

No. of CoresNominal Cross Sectional Area mm²Nominal Thickness of Insulation mmNominal Overall Diameter mmNominal Weight kg/kmBW / CW GlandWraparound Cleats
Under ArmourOverall
21.50.67.312.130220CC5
22.50.78.513.634620CC6
240.79.414.741020SCC7
260.710.515.949920CC7
2100.712.31864820CC8
2160.714.320.497820CC9
2250.914.720.4129025CC9
2350.916.823.3150025CC10
25011925.8189025CC11
2701.12229245032CC12
2951.125.133.1330032CC14
21201.227.936.1402040CC16
21501.430.939.3475040CC16
31,50.67.812.633020CC5
32.50.79.214.139020SCC6
340.71015.346420SCC7
360.711.216.656820CC7
3100.713.119.586620CC8
3160.715.321.6115225CC9
3250.918.923.6180025CC11
3350.921.325.7223032CC12
350121.728.5249032CC12
3701.125.232.2329032CC14
3951.128.837444040CC16
31201.23240.4547040CC16
31501.435.945.5693050SCC18
31851.64049.8835063SCC20
32401.744.955.11040063S-
33001.849.860.21260063S-
3400255.866.61460075S-
41.50.68.513.336520SCC6
42.50.79.91543820CC6
440.71116.453220CC7
460.712.318.776420CC8
4100.714.521.1101325CC9
4160.71723.4136025CC10
4250.92126.1216032CC11
4350.923.628.6269032CC12
45012532313032CC14
4701.129.537.7450040CC16
4951.133.341.7560050SCC18
41201.237.547.1740050CC20
41501.441.651.4878050-
41851.646.456.61063063S-
42401.752.6631339063-
43001.85868.81629075S-
4400265.478.11980090-
51.50.69.714.341020SCC6
52.50.711.716.147020CC7
540.71317.871020CC7
560.714.52087625CC8
5100.717.222.9116525CC10
5160.72026.6174232CC11
5250.924.731.5232332CC14
5350.927.834.8293240CC14
550132.440.4419250SCC16
71.50.610.215.247020SCC6
72.50.712.317.160020CC7
740.713.619.188120CC8
121.50.613.719.478020CC8
122.50.716.322.4100025CC9
191.50.616.222.2100025CC9
192.50.719.926.6154025CC11
271.50.62026.7150032CC11
272.50.72430.7195032CC14
371.50.622.329180032CC12
372.50.726.933.8235040CC14

Class 2 Stranded Conductors for Single Core and Multi-Core Cables
Nominal Cross
Sectional Area mm²
Minimum No. Of Wires In ConductorMaximum Resistance
of Conductor At 20ºC
CircularCircular CompactedShapedAnnealed Copper Conductor
CuAlCuAlCuAlPlain Wires ohms/km
1.57-6---12.1
2.57-6---7.41
47-6---4.61
67-6---3.08
107766--1.83
167766--1.15
257766660.727
357766660.524
50191966660.387
701919121212120.268
951919151515150.193
1203737181518150.153
1503737181518150.124
1853737303030300.0991
2403737343034300.0754
3006161343034300.0601
4006161535353530.047

Current Carrying Capacity
Nominal Cross
Sectional Area mm²
Reference Method C
(Clipped Direct)
Reference Method E
(In Free Air or on a Perforated Cable Tray, Horizontal or Vertical)
Reference Method D (direct in ground or in ducting in ground, in or around Buildings)
1 Two Core Cable
Single-Phase
AC or DC
1 Three or 1 Four core cable Three-phase
AC
1 Two core cable Single-Phase
AC or DC
1 Three or 1 Four core cable
Three-Phase
AC
1 Two core cable
single-phase
AC or DC
1 Three or 1 Four core cable three-phase AC
1.5272329252521
2.5363139333328
4494252444336
662536656 5344
10857390787158
16 11094115999175
25146124152131 11696
35180154188162139115
50219187228197164135
70279238291251 203167
95338289354304239197
120392335410353271223
150451386472406306251
185515441539463343281
240607520636546395324
300698599732628446365
400787673847728--

Ambient temperature: 30ºC
Conductor operating temperature: 90ºC

Notes
1. Where a conductor operates at a temperature exceeding 70ºC it must be ascertained that the equipment connected to the conductor is suitable for the conductor operating
temperature (see Regulation 512.1.2 of the 17th Edition of IEE Wiring Regulations).
2. Where cables in this table are connected to equipment or accessories designed to operate at a temperature not exceeding 70ºC , the current ratings given in the equivalent
table for 70ºC thermoplastic insulated cables (Table 4D3A) must be used (see Regulation 523.1 of the 17th Edition of IEE Wiring Regulations).
The above table is in accordance with Table 4E3A of the 17th Edition of IEE Wiring Regulations.

Voltage Drop

Nominal Cross
Sectional Area mm²
Two Core Cable DCTwo Core Cable
Single-Phase AC
mV/A/m
Three Or Four Core Cable Three-Phase AC
mV/A/m
1.5313127
2.5191916
4121210
67.97.96.8
104.74.74
162.92.92.5
rxzrxz
251.851.850.1601.9001.6000.1401.650
351.35 1.350.1551.3501.1500.1351.150
500,98 0.990.1551.0000.8600.1350.870
700.670.670.1500.6900.5900.1300.600
950.490.500.1500.5200.4300.1300.450
1200.390.400.1450.4200.3400.1300.370
1500.310.320.1450.3500.2800.125 0.300
1850.250.260.1450.2900.2200.1250.260
2400.1950.200.1400.2400.1750.1250.120
3000.1150.160.1400.2100.1400.1200.185
4000.120.130.1400.1900.1150.1200.165

Conductor operating temperature: 90ºC
r = Resistive Component
x = Reactive Component
z = Impedance Value

For cables having conductors of 16mm2 or less cross sectional area their inductances can be ignored and (mV/A/m)r values only are tabulated. For cables having conductors greater than 16mm2, cross sectional area the impedance values are given as (mV/A/m)z, together with the resistive component (mV/A/m)r and the reactive component (mV/A/m)x.

The above paragraph is extracted from Appendix 4 of the 17th Edition of IEE Wiring Regulations.

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