Application
Standards Conductor
Separator Sheath
Sheath Colour Voltage Rating Temperature Rating
Provides the 650/750 volt D.C. supply from traction substations and track paralleling huts to conductor rails, negative cable connections and where appropriate, bonding.
NR/PS/ELP/21101 (formerly RT/E/S/21101)
Class 2 stranded aluminium or tinned copper to BS EN 60228:2005 (previously BS6360)
PETP (Polyethylene Terephthalate)
CSP (Chlorosulphonated Polyethylene) Type RS4 to BS6899
Black
650/750V
-25°C to +85°C
Minimum Bending
Radius Aluminium conductor: 10 x overall diameter Copper conductor: 8 x overall diameter
Dimensions
Rail Catalogue
Number Nominal
Cross Sectional
Area mm²
Conductor
Material No. and Nominal Diameter of
Strands
# / mm
Nominal Diameter of
Conductor mm
Nominal Overall Diameter mm
Assigned Continuous
Current Rating
Amps
006/116610 1000 Aluminium 127/3.20 41.6 53.0 1500
006/116612 630 Copper 127/2.52 32.8 44.2 1500
006/132840 500 Aluminium 61/3.20 28.8 40.2 800
Positive Track Cables
Rail Catalogue
Number Nominal
Cross Sectional
Area mm²
Conductor
Material No. and Nominal Diameter of
Strands
# / mm
Nominal Diameter of
Conductor mm
Nominal Overall Diameter mm
Assigned Continuous
Current Rating
Amps
006/132991 800 Aluminium 127/2.85 37.1 48.5 1200
006/132990 240 Aluminium 61/2.25 20.3 28.3 550
006/132340 161 Copper 91/1.53 16.8 24.8 550
006/116601 150 Aluminium 37/2.25 15.8 19.4 430
Negative Track Cables
6491B Cable
Application
Standards Conductor
Insulation Insulation Colour Voltage Rating
Suitable for use in conduit and for fixed, protected installation. For installation where fire, smoke emission and toxic fumes create a potential threat to life and equipment.
BS7211
Class 2 stranded plain copper conductors to BS EN 60228:2005 (previously BS6360)
LSZH (Low Smoke Zero Halogen)
Black, Blue, Green/Yellow, Red, Yellow, White, Violet, Brown, Grey, Orange, Pink
450/750V
Temperature Rating Minimum Bending Radius
0°C to +90°C
Up to 10mm²: 3 x overall diameter 10mm² to 25mm²: 4 x overall diameter Above 25mm²: 5 x overall diameter
Dimensions
No. of Cores x Nominal Cross Sectional Area
# x mm²
Nominal Thickness of Insulation
mm
Nominal Overall Diameter
mm Nominal Weight
kg/Km
1 x 1.5 0.7 3.4 22
1 x 2.5 0.8 4.2 35
1 x 4.0 0.8 4.8 50
1 x 6.0 0.8 5.4 72
1 x 10.0 1.0 6.8 121
1 x 16.0 1.0 8.0 182
1 x 25.0 1.2 9.8 285
1 x 35.0 1.2 11.0 390
1 x 95.0 1.6 17.0 980
1 x 120.0 1.6 19.0 1220
1 x 150.0 1.8 21.0 1500
1 x 185.0 2.2 23.5 1910
1 x 240.0 2.2 26.5 2490
1 x 300.0 2.4 29.5 3100
1 x 400.0 2.6 33.5 3950
1 x 500.0 2.8 37.0 5000
1 x 630.0 2.8 41.0 6350
Conductors
Class 2 stranded conductors for single core and multi-core cables
1 2 3 4 5 6 7 8
Nominal Cross Sectional
Areamm²
Minimum Number of Wires in the Conductor Maximum Resistance of Conductor at 20ºC Circular Circular
Compacted Shaped Annealed Copper Conductor
Cu Al Cu Al Cu Al Plain Wires
ohms/Km
1.50 7 - 6 - - - 12.1000
2.50 7 - 6 - - - 7.4100
4.00 7 - 6 - - - 4.6100
6.00 7 - 6 - - - 3.0800
10.00 7 7 6 6 - - 1.8300
16.00 7 7 6 6 - - 1.1500
25.00 7 7 6 6 6 6 0.7270
35.00 7 7 6 6 6 6 0.5240
95.00 19 19 15 15 15 15 0.1930
120.00 37 37 18 15 18 15 0.1530
150.00 37 37 18 15 18 15 0.1240
185.00 37 37 30 30 30 30 0.0991
240.00 37 37 34 30 34 30 0.0754
300.00 61 61 34 30 34 30 0.0601
400.00 61 61 53 53 53 53 0.0470
500.00 61 61 53 53 53 53 0.0366
600.00 91 91 53 53 53 53 0.0283
Table in accordance with BS EN 60228:2005 (previously BS6360).
6491B Cable
Nominal Cross Sectional
Areamm²
Reference Method 4 (enclosed in conduit in thermally insulating
wall etc)
Reference Method 3 (enclosed in conduit
on a wall or in trunking etc.)
Reference Method 1
(clipped direct) Reference Method 11 (on a perforated cable
tray horizontal or vertical)
Reference Method 12 (free air) Horizontal
Flat Spaced
Vertical Flat Spaced
Trefoil
2 Cables Single Phase AC or AmpsDC
3 or 4 Cables
Three Phase AmpsAC
2 Cables Single Phase AC or AmpsDC
3 or 4 Cables
Three Phase AmpsAC
2 Cables Single Phase Cables Three Phase AC
Flat and Touching or Trefoil
Amps
2 Cables Single Phase Cables Three Phase AC
Flat and Touching or Trefoil Amps
2 Cables Single Phase AC
or DC or 3 Cables Three Phase AmpsAC
2 Cables Single Phase AC
or DC or 3 Cables Three Phase AC
Amps
3 Cables Three Phase AmpsAC
1 2 3 4 5 6 7 8 9 10 11 12
-25.0 100 91 126 111 143 130.0 158 140 183 163 138
35.0 124 111 156 138 176 161.0 195 176 226 203 171
50.0 149 135 189 168 228 209.0 293 215 274 246 209
70.0 189 170 240 214 293 268.0 308 279 351 318 270
95.0 228 205 290 259 355 326.0 375 341 426 389 330
120.0 263 235 336 299 413 379.0 436 398 495 453 385
150.0 300 270 375 328 476 436.0 505 461 570 524 445
185.0 341 306 426 370 545 500.0 579 530 651 600 511
240.0 400 358 500 433 644 590.0 686 630 769 711 606
300.0 459 410 573 493 743 681.0 794 730 886 824 701
400.0 - - 683 584 868 793.0 915 849 1065 994 820
500.0 - - 783 666 990 904.0 1044 973 1228 1150 936
630.0 - - 900 764 1130 1033.0 1191 1115 1423 1338 1069
800.0 - - - - 1288 1179.0 1358 1275 1581 1485 1214
1000.0 - - - - 1443 1323.0 1520 1436 1775 1671 1349
Electrical Characteristics
Current Carrying Capacity (amperes)
Ambient temperature: 30°C
Conductor operating temperature: 90°C
Voltage Drop (per ampere per metre)
Nominal Cross - Sectional Area mm²
2 Cables, Single Phase AC 2 Cables
mV/A/mDC
Reference Methods 3 & 4 (enclosed in conduit etc,
in or on a wall) mV/A/m
Reference Methods 1 & 11 (clipped direct or on trays, touching)
mV/A/m
Reference Method 12 (spaced*) mV/A/m
25.0 1.850 1.850 0.31 1.90 1.850 0.190 1.850 1.850 0.28 1.85
35.0 1.350 1.350 0.29 1.35 1.350 0.180 1.350 1.350 0.27 1.35
50.0 0.990 1.000 0.29 1.05 0.990 0.180 1.000 0.990 0.27 1.00
70.0 0.680 0.700 0.28 0.75 0.680 0.175 0.710 0.680 0.26 0.73
95.0 0.490 0.510 0.27 0.58 0.490 0.170 0.520 0.490 0.26 0.56
120.0 0.390 0.410 0.26 0.48 0.390 0.165 0.430 0.390 0.25 0.47
150.0 0.320 0.330 0.26 0.43 0.320 0.165 0.360 0.320 0.25 0.41
185.0 0.250 0.270 0.26 0.37 0.260 0.165 0.300 0.250 0.25 0.36
240.0 0.190 0.210 0.26 0.33 0.200 0.160 0.250 0.195 0.25 0.31
300.0 0.155 0.175 0.25 0.31 0.160 0.160 0.220 0.155 0.25 0.29
400.0 0.120 0.140 0.25 0.29 0.130 0.155 0.200 0.125 0.24 0.27
500.0 0.093 0.120 0.25 0.28 0.105 0.155 0.185 0.098 0.24 0.26
630.0 0.072 0.100 0.25 0.27 0.086 0.155 0.175 0.078 0.24 0.25
800.0 0.056 - 0.072 0.150 0.170 0.640 0.24 0.25
1000.0 0.045 - 0.063 0.150 0.165 0.054 0.24 0.24
6491B Cable
Conductor operating temperature: 90°C r = Resistive Component
x = Reactive Component z = Impedance Value Notes
1. Where the conductor is to be protected by a semi-enclosed fuse to BS3036, see item 6.2 of the preface to appendix 4 within 16th edition regs.
2. The current-carrying capacities in columns 2 to 5 are also applicable to flexible cables BS7211 table 3(b) where the cables are used in fixed installations.
Voltage Drop (per ampere per metre)
3 or 4 Cables, Three Phase AC Reference Methods 3 & 4
(enclosed in conduit etc, in or on a wall)
mV/A/m
Reference Methods 1, 11 & 12 (in trefoil) mV/A/m
Reference Method (flat and touching)
mV/A/m
Reference Methods 12 (flat spaced*)
mV/A/m
6 7 8 9
40.0 40.0 40.0 40.0
27.0 27.0 27.0 27.0
16.0 16.0 16.0 16.0
10.0 10.0 10.0 10.0
6.8 6.8 6.8 6.8
4.0 4.0 4.0 4.0
2.5 2.5 2.5 2.5
r x z r x z r x z r x z
1.600 0.27 1.650 1.600 0.165 1.60 1.600 0.190 1.600 1.600 0.27 1.65
1.150 0.25 1.150 1.150 0.155 1.15 1.150 0.180 1.150 1.150 0.26 1.20
0.870 0.25 0.900 0.860 0.155 0.87 0.860 0.180 0.870 0.860 0.26 0.89
0.600 0.24 0.650 0.590 0.150 0.61 0.590 0.175 0.620 0.590 0.25 0.65
0.440 0.23 0.500 0.430 0.145 0.45 0.430 0.170 0.460 0.430 0.25 0.49
0.350 0.23 0.420 0.340 0.140 0.37 0.340 0.165 0.380 0.340 0.24 0.42
0.290 0.23 0.370 0.280 0.140 0.31 0.280 0.165 0.320 0.280 0.24 0.37
0.230 0.23 0.320 0.220 0.140 0.26 0.220 0.165 0.280 0.220 0.24 0.33
0.190 0.22 0.290 0.170 0.140 0.22 0.170 0.165 0.240 0.170 0.24 0.29
0.150 0.22 0.270 0.140 0.140 0.20 0.135 0.160 0.210 0.135 0.24 0.27
0.130 0.22 0.250 0.110 0.135 0.18 0.110 0.160 0.195 0.110 0.24 0.26
0.100 0.22 0.240 0.090 0.135 0.16 0.088 0.160 0.180 0.085 0.24 0.25
0.090 0.21 0.230 0.074 0.135 0.15 0.171 0.160 0.170 0.068 0.23 0.24
- 0.062 0.130 0.15 0.059 0.155 0.165 0.055 0.23 0.24
- 0.055 0.130 0.14 0.050 0.155 0.165 0.047 0.23 0.24
3. For cable in rigid PVC conduit the values stated in table 4D1 are applicable (see Regulation 512-02).
4. Where a conductor operates at a temperature exceeding 70°C, it shall be ascertained that the equipment connected to the conductor is suitable for the conductor operating temperature (see Regulation 512-02).
5. Where cables in this table are connected to equipment or accessories designed to operate at a temperature not exceeding 70°C, the current ratings given in the equivalent table for 70°C PVC insulated cables BS6004, BS6346 shall be used (see Reg 523-01-01).
* Spacings larger than those specified in Method 12 (see table 4A 16th edition regs) will result in larger volt drop.
6491X Cable
Application
Standards Conductor
Insulation Insulation Colour Voltage Rating
For use in conduit and fixed, protected installation in switchgear, lighting and appliances.
BS6004
H07V-R: Class 2 stranded plain copper conductors to BS EN 60228:2005 (previously BS6360)
H07V-U: Class 1 solid plain copper conductor to BS EN 60228:2005 (previously BS6360)
PVC (Polyvinyl Chloride) Type TI1 to BS7655
Red, Black, Blue, Yellow, Brown, White, Green/Yellow, Grey
450/750V
Temperature Rating Minimum Bending Radius
0°C to +70°C
Up to 10mm²: 3 x overall diameter 10mm² to 25mm²: 4 x overall diameter Above 25mm²: 5 x overall diameter
Dimensions
No. of Cores x Nominal Cross Sectional Area
# x mm²
Nominal Thickness of Insulation
mm
Maximum Overall Diameter
mm
Nominal Weight kg/Km
1 x 1.5 0.7 3.3 22
1 x 2.5 0.8 3.9 32
1 x 4.0 0.8 4.6 50
1 x 6.0 0.8 5.2 71
1 x 10.0 1.0 6.7 120
1 x 16.0 1.0 7.8 180
1 x 25.0 1.2 9.7 280
1 x 35.0 1.2 10.9 380
1 x 50.0 1.4 12.8 510
1 x 70.0 1.4 14.6 710
1 x 95.0 1.6 17.1 970
1 x 120.0 1.6 18.8 1200
1 x 150.0 1.8 20.9 1480
1 x 185.0 2.0 23.3 1900
1 x 240.0 2.2 26.6 2480
1 x 300.0 2.4 29.6 3100
Conductors
Class 2 stranded conductors for single core and multi-core cables
1 2 3 4 5 6 7 8
Nominal Cross Sectional
Areamm²
Minimum Number of Wires in the Conductor Maximum Resistance of Conductor at 20ºC Circular Circular
Compacted Shaped Annealed Copper Conductor
Cu Al Cu Al Cu Al Plain Wires
ohms/Km
1.00 7 - - - - - 18.1000
1.50 7 - 6 - - - 12.1000
2.50 7 - 6 - - - 7.4100
4.00 7 - 6 - - - 4.6100
6.00 7 - 6 - - - 3.0800
10.00 7 7 6 6 - - 1.8300
16.00 7 7 6 6 - - 1.1500
25.00 7 7 6 6 6 6 0.7270
35.00 7 7 6 6 6 6 0.5240
50.00 19 19 6 6 6 6 0.3870
70.00 19 19 12 12 12 12 0.2680
95.00 19 19 15 15 15 15 0.1930
120.00 37 37 18 15 18 15 0.1530
150.00 37 37 18 15 18 15 0.1240
185.00 37 37 30 30 30 30 0.0991
240.00 37 37 34 30 34 30 0.0754
300.00 61 61 34 30 34 30 0.0601
630.00 91 91 53 53 53 53 0.0283
Table in accordance with BS EN 60228:2005 (previously BS6360).
6491X Cable
Conductor Cross Sectional
Areamm²
Reference Method A (enclosed in conduit in thermally insulating
wall etc.) Amps
Reference Method B (enclosed in conduit on a wall or in a
trunking etc.) Amps
Reference Method C (clipped direct)
Amps
Reference Method F (in free air or on a perforated cable tray etc.
horizontal or vertical) Amps
Touching Spaced by one
Diameter 2 Cables
Single Phase AC or DC
3 or 4 Cables
Three Phase AC
2 Cables Single Phase AC or DC
3 or 4 Cables
Three Phase AC
2 Cables Single Phase AC or DC
Flat or Touching
3 or 4 Cables Three Phase AC Flat &
Touching or Trefoil
2 Cables Single Phase
2 Cables Single Phase AC or DC or 3 Cables Three Phase AC Flat Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
-25.0 80.0 73.0 101.0 89.0 114.0 104.0 131 114 110 146 130
35.0 99.0 89.0 125.0 110.0 141.0 129.0 162 143 137 181 162
50.0 119.0 108.0 151.0 134.0 182.0 167.0 196 174 167 219 197
70.0 151.0 136.0 192.0 171.0 234.0 214.0 251 225 216 281 254
95.0 182.0 164.0 232.0 207.0 284.0 261.0 304 275 264 341 311
120.0 210.0 188.0 269.0 239.0 330.0 303.0 352 321 308 396 362
150.0 240.0 216.0 300.0 262.0 381.0 349.0 406 372 356 456 419
185.0 273.0 245.0 341.0 296.0 436.0 400.0 463 427 409 521 480
240.0 321.0 286.0 400.0 346.0 515.0 472.0 546 507 485 615 569
300.0 367.0 328.0 458.0 394.0 594.0 545.0 629 587 561 709 659
400.0 - - 546.0 467.0 694.0 634.0 754 589 656 852 795
500.0 - - 626.0 533.0 792.0 723.0 868 789 749 982 920
630.0 - - 720.0 611.0 904.0 826.0 1005 905 855 1138 1070
Current Carrying Capacity (amperes)
Ambient temperature: 30°C
Conductor operating temperature: 70°C
The above table is in accordance with Table 4D1A of the 17th Edition of IEE Wiring Regulations.
Electrical Characteristics
Voltage Drop (per ampere per metre)
Conductor Cross Sectional
Area mm²
2 Cables mV/A/mDC
2 Cables, Single Phase AC mV/A/m Reference Methods
A & B (enclosed in conduit or
trunking)
Reference Methods C, F, & G (clipped direct, on tray or in free air)
Cable Touching Cable Spaced*
1 2 3 4 5
1.0 44.000 44.0 44.0 44.0
1.5 29.000 29.0 29.0 29.0
2.5 18.000 18.0 18.0 18.0
4.0 11.000 11.0 11.0 11.0
6.0 7.300 7.3 7.3 7.3
10.0 4.400 4.4 4.4 4.4
16.0 2.800 2.8 2.8 2.8
r x z r x z r x z
25.0 1.750 1.800 0.33 1.80 1.750 0.200 1.750 1.750 0.29 1.80
35.0 1.250 1.300 0.31 1.30 1.250 0.195 1.250 1.250 0.28 1.30
50.0 0.930 0.950 0.30 1.00 0.930 0.190 0.950 0.930 0.28 0.97
70.0 0.630 0.650 0.29 0.72 0.630 0.185 0.660 0.630 0.27 0.69
95.0 0.460 0.490 0.28 0.56 0.470 0.180 0.500 0.470 0.27 0.54
120.0 0.360 0.390 0.27 0.47 0.370 0.175 0.410 0.370 0.26 0.45
150.0 0.290 0.310 0.27 0.41 0.300 0.175 0.340 0.290 0.26 0.39
185.0 0.230 0.250 0.27 0.37 0.240 0.170 0.290 0.240 0.26 0.35
240.0 0.180 0.195 0.26 0.33 0.185 0.165 0.250 0.185 0.25 0.31
300.0 0.145 0.160 0.26 0.31 0.150 0.165 0.220 0.150 0.25 0.29
400.0 0.105 0.130 0.26 0.29 0.120 0.160 0.200 0.115 0.25 0.27
500.0 0.086 0.110 0.26 0.28 0.098 0.155 0.185 0.093 0.24 0.26
630.0 0.068 0.094 0.25 0.27 0.081 0.155 0.175 0.076 0.24 0.25
6491X Cable
Voltage Drop (per ampere per metre)
r = Resistive Component x = Reactive Component z = Impedance Value
Conductor operating temperature: 70°C
* Spacings larger than one cable diameter will result in a larger voltage drop.
The above table is in accordance with Table 4D1B of the 17th Edition of IEE Wiring Regulations.
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 16th Edition of IEE Wiring Regulations. 3 or 4 Cables, Three Phase AC
mV/A/m Reference Methods
A & B (enclosed in conduit or
trunking)
Reference Methods C, F, & G (clipped direct, on tray or in free air) Cable Touching
Trefoil Cable Touching
Flat Cable Spaced*
Flat
6 7 8 9
38.0 38.0 38.0 38.0
25.0 25.0 25.0 25.0
15.0 15.0 15.0 15.0
9.5 9.5 9.5 9.5
6.4 6.4 6.4 6.4
3.8 3.8 3.8 3.8
2.4 2.4 2.4 2.4
r x z r x z r x z r x z
1.500 0.29 1.55 1.500 0.175 1.500 0.150 0.25 1.55 1.500 0.32 1.55
1.100 0.27 1.10 1.100 0.170 1.100 1.100 0.24 1.10 1.100 0.32 1.15
0.810 0.26 0.85 0.800 0.165 0.820 0.800 0.24 0.84 0.800 0.32 0.86
0.560 0.25 0.61 0.550 0.160 0.570 0.550 0.24 0.60 0.550 0.31 0.63
0.420 0.24 0.48 0.410 0.155 0.430 0.410 0.23 0.47 0.400 0.31 0.51
0.330 0.23 0.41 0.320 0.150 0.360 0.320 0.23 0.40 0.320 0.30 0.44
0.270 0.23 0.36 0.260 0.150 0.300 0.260 0.23 0.34 0.260 0.30 0.40
0.220 0.23 0.32 0.210 0.145 0.260 0.210 0.22 0.31 0.210 0.30 0.36
0.170 0.23 0.29 0.160 0.145 0.220 0.160 0.22 0.27 0.160 0.29 0.34
0.140 0.23 0.27 0.130 0.140 0.190 0.130 0.22 0.25 0.130 0.29 0.32
0.120 0.22 0.25 0.105 0.140 0.175 0.105 0.21 0.24 0.100 0.29 0.31
0.100 0.22 0.25 0.086 0.135 0.160 0.086 0.21 0.23 0.081 0.29 0.30
0.080 0.22 0.24 0.072 0.135 0.150 0.072 0.21 0.22 0.066 0.28 0.29