ACADEMIA DO CONHECIMENTO

Current Ratings & Volt Drop – IEE

TABLE 4A2 Schedule of appropriate current ratings tables - IEE

Specification number  Specification Title Applicable Current Rating Tables Conductor Operating Temperature
BS5467:1997 Specification for 600/1000V & 1900/3300V armoured electric cables having thermosetting insulation 4E3, 4E4, 4L3, 4L4 90ºC
BS6004:2000 Electric cables. PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring 4D1, 4D2, 4E1 70ºC, 90ºC
PVC insulated & sheathed flat cable with protective conductor to Table 8 4D5 70ºC
BS6207-1:1995 Mineral insulated cables with a rated voltage not exceeding 750V 4J1, 4J2 70ºC*, 105ºC*
BS6346:1997 Specification for 600/1000V & 1900/3300V armoured electric cables having PVC insulation 4D3, 4D4, 4K3, 4K4 70ºC
BS6500:2000 Electric cbales. Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments 4H3 60ºC, 90ºC
BS6724:1997 Specification for 600/1000V & 1900/3300Varmoured electric cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire 4E3, 4E4, 4L3, 4L4 90ºC
BS6883:1999 Elastomer insulated cables for fixed wiring in ships and on mobile & fixed offshore units. Requirements & test methods 4F1, 4F2 85ºC
BS7211:1998 Specification for thermosetting insulated cables (non-armoured) for electric power & lighting with low emission of smoke & corrosive gases when affected by fire 4E1, 4E2 90ºC
BS7629-1:1997 Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables 4D2 70ºC
BS7846:2000 Electric cables. 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire 4E4 90ºC
BS7889:1997 Specification for 600/1000V single-core unarmoured electric cables having thermosetting insulation 4E1, 4L1 90ºC
BS7919:2001 Electric cables. Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments 4H1, 4H2, 4H3 60ºC,  110ºC
BS8436:2004 300/500V screened electric cables having low emission of smoke & corrosive gases when affected by fire, for use in thin partitions and building voids 4D2 70ºC
BSEN60702-1:2001 Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables 4J1, 4J2 70ºC*, 105ºC*
 * sheath operating temperature

TABLE 4A3 Schedule of appropriate current ratings tables - IEE

Specification Number Specification Title Applicable Current Rating Tables (16th edition tables) Conductor Operating Temperature
BS5467:1997 Electric cables – thermosetting insulated armoured cables for voltages of 600/1000V & 1900/3300V 4E3, 4E4, 4J3, 4J4 (4L3, 4L4) 90ºC
BS6004:2000 Electric cables – PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring 4D1, 4D2 70ºC
Thermoplastic insulated & sheathed flat cable with protective conductor to Table 8 4D5 70ºC
BS6231 Electic cables – single-core PVC insulated flexible cables of rated voltage 600/1000Vfor switchgear & controlgear wiring 4D1 70ºC*
BS6346:1997 Electric cables – PVC insulated, armoured cables for voltages of 600/1000V & 1900/3300V 4D3, 4D4, 4H3, 4H4 (4K3, 4K4), 4J3, 4J4 70ºC
BS6500:2000 Electric cbales – Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments 4F3 (4H3) 60ºC, 90ºC
BS6724:1997 Electric cables – thermosetting insulated, armoured cables for voltages of 600/1000V & 1900/3300V having low emission of smoke and corrosive gases when affected by fire 4E3, 4E4, 4J3, 4J4 (4L3, 4L4) 90ºC
BS7211:1998 Electric cables – thermosetting insulated non-armoured cables for voltages up to and including 450-750V for electric power, lighting & internal wiring and having low emission of smoke & corrosive gases when affected by fire 4E2 90ºC
BS7629-1:1997 Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables 4D2 70ºC
BS7846:2000 Electric cables – 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire 4E3, 4E4, 4J3, 4J4 90ºC
BS7889:1997 Electric cables – thermosetting insulated, armoured cables for a voltatge of 600/1000V 4E1 90ºC
BS7919:2001 Electric cables – Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments 4F1, 4F2, 4F3, (4H1, 4H2, 4H3) 60ºC,  90ºC
BS8436:2004 Electric cables – 300/500V screened electric cables having low emission ofsmoke & corrosive gases when affected by fire, for use in walls, partitions and building voids – multicore cables 4D2 70ºC
BSEN60702-1:2001 Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables 4G1, 4G2 (4J1, 4J2) 70ºC**, 105ºC**
*  cables to BS6231 when installed in conduit or trunking are rated to 70ºC
** sheath operating temperature

Table 4D1A PVC Insulation / Copper / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4D1A
  • Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
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
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
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
1 11 10.5 13.5 12 15.5 14
1.5 14.5 13.5 17.5 15.5 20 18
2.5 20 18 24 21 27 25
4 26 24 32 28 37 33
6 34 31 41 36 47 43
10 46 42 57 50 65 59
16 61 56 76 68 87 79
25 80 73 101 89 114 104 131 114 110 146 130
35 99 89 125 110 141 129 162 143 137 181 162
50 119 108 151 134 182 167 196 174 167 219 197
70 151 136 192 171 234 214 251 225 216 281 254
95 182 164 232 207 284 261 304 275 264 341 311
120 210 188 269 239 330 303 352 321 308 396 362
150 240 216 300 262 381 349 406 372 356 456 419
185 273 245 341 296 436 400 463 427 409 521 480
240 321 286 400 346 515 472 546 507 485 615 569
300 367 328 458 394 594 545 629 587 561 709 659
400 546 467 694 634 754 689 656 852 795
500 626 533 792 723 868 789 749 982 920
630 720 611 904 826 1005 905 855 1138 1070
800 1030 943 1086 1020 971 1265 1188
1000 1154 1058 1216 1149 1079 1420 1337

Table 4D2A PVC Insulation / Copper / Multi-core / Non-armoured - IEE

  • Standard : BS 7671
  • Table 4D2A
  • Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7 8 9
1 11 10 13 11.5 15 13.5 17 14.5
1.5 14 13 16.5 15 19.5 17.5 22 18.5
2.5 18.5 17.5 23 20 27 24 30 25
4 25 23 30 27 36 32 40 34
6 32 29 38 34 46 41 51 43
10 43 39 52 46 63 57 70 60
16 57 52 69 62 85 76 94 80
25 75 68 90 80 112 96 119 101
35 92 83 111 99 138 119 148 126
50 110 99 133 118 168 144 180 153
70 139 125 168 149 2134 184 232 196
95 167 150 201 179 258 223 282 238
120 192 172 232 206 299 259 328 276
150 219 196 258 225 344 299 379 319
185 248 223 294 255 392 341 434 364
240 291 261 344 297 461 403 514 430
300 334 298 394 339 530 464 593 497
400 470 402 634 557 715 597

Table 4D3A PVC Insulation / Copper / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4D3A
  • Single-core armoured 70 °C thermoplastic insulated cables
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
Touching Touching Spaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC 2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
Horizontal Vertical Horizontal Vertical Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
50 193 179 205 189 181 229 216 229 217 230 212
70 245 225 259 238 231 294 279 287 272 286 263
95 296 269 313 285 280 357 340 349 332 338 313
120 342 309 360 327 324 415 396 401 383 385 357
150 393 352 413 373 373 479 458 449 429 436 405
185 447 399 469 422 425 548 525 511 489 490 456
240 525 465 550 492 501 648 622 593 568 566 528
300 594 515 624 547 567 748 719 668 640 616 578
400 687 575 723 618 657 885 851 737 707 674 632
500 763 622 805 673 731 1035 997 810 777 721 676
630 843 669 891 728 809 1218 1174 893 856 771 723
800 919 710 976 777 886 1441 1390 943 905 824 772
1000 975 737 1041 808 945 1685 1627 1008 967 872 816

Table 4D4A PVC Insulation / Copper / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4D4A
  • Multi-core armoured 70 °C thermoplastic insulated cables
  • Copper conductors
  • Conductor temperature: 70 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7
1.5 21 18 22 19 22 18
2.5 28 25 31 26 29 24
4 38 33 41 35 37 30
6 49 42 53 45 46 38
10 67 58 72 62 60 507
16 89 77 97 83 78 64
25 118 102 128 110 99 82
35 145 125 157 135 119 98
50 175 151 190 163 140 116
70 222 192 241 207 173 143
95 269 231 291 251 204 169
120 310 267 336 290 231 192
150 356 306 386 332 261 217
185 405 348 439 378 292 243
240 476 409 516 445 336 280
300 547 469 592 510 379 316
400 621 540 683 590

Table 4E1A XLPE Insulation / Copper / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4E1A
  • Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
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
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
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
1 14 13 17 15 19 17.5
1.5 19 17 23 20 25 23
2.5 26 23 31 28 34 31
4 35 31 42 37 46 41
6 45 40 54 48 59 54
10 61 54 75 66 81 74
16 81 73 100 88 109 99
25 106 95 133 117 143 130 161 141 135 182 161
35 131 117 164 144 176 161 200 176 169 226 201
50 158 141 198 175 228 209 242 216 207 275 246
70 200 179 253 222 293 268 310 279 268 353 318
95 241 216 306 269 355 326 377 342 328 430 389
120 278 249 354 312 413 379 437 400 383 500 454
150 318 285 393 342 476 436 504 464 444 577 527
185 362 324 449 384 545 500 575 533 510 661 605
240 424 380 528 450 644 590 679 634 607 781 719
300 486 435 603 514 743 681 783 736 703 902 833
400 683 584 868 793 940 868 823 1085 1008
500 783 666 990 904 1083 998 946 1253 1169
630 900 764 1130 1033 1254 1151 1088 1454 1362
800 1288 1179 1358 1275 1214 1581 1485
1000 1443 1323 1520 1436 1349 1775 1671

Table 4E2A XLPE Insulation / Copper / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4E2A
  • Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7 8 9
1 14.5 13 17 15 19 17 21 18
1.5 18.5 16.5 22 19.5 24 22 26 23
2.5 25 22 30 26 33 30 36 32
4 33 30 40 35 45 40 49 42
6 42 38 51 44 58 52 63 54
10 57 51 69 60 80 71 86 75
16 76 68 91 80 107 96 115 100
25 99 89 119 105 138 119 149 127
35 121 109 146 128 171 147 185 158
50 145 130 175 154 209 179 225 192
70 183 164 221 194 269 229 289 246
95 220 197 265 233 328 278 352 298
120 253 227 305 268 382 322 410 346
150 290 259 334 300 441 371 473 399
185 329 295 384 340 506 424 542 456
240 386 346 459 398 599 500 641 538
300 442 396 532 455 693 576 741 621
400 625 536 803 667 865 741

Table 4E3A XLPE Insulation / Copper / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4E3A
  • Single-core armoured 90 °C thermosetting insulated cables
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
Touching Touching Spaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC 2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
Horizontal Vertical Horizontal Vertical Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
50 237 220 253 232 222 284 270 282 266 288 266
70 303 277 322 293 285 356 349 357 337 358 331
95 367 333 389 352 246 446 426 436 412 425 393
120 425 383 449 405 402 519 497 504 477 485 449
150 488 437 516 462 463 600 575 566 539 549 510
185 557 496 587 524 529 688 660 643 614 618 574
240 656 579 689 612 625 815 782 749 714 715 666
300 755 662 792 700 720 943 906 842 805 810 755
400 853 717 899 767 815 1137 1094 929 889 848 797
500 962 791 1016 851 918 1314 1266 1032 989 923 871
630 1082 861 1146 935 1027 1528 1474 1139 1092 992 940
800 1170 904 1246 987 1119 1809 1744 1204 1155 1042 978
1000 1261 961 1345 1055 1214 2100 2026 1289 1238 1110 1041

Table 4E4A XLPE Insulation / Copper / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4E4A
  • Multi-core armoured 90 °C thermosetting insulated cables
  • Copper conductors
  • Conductor temperature: 90 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7
1.5 27 23 29 25 25 21
2.5 36 31 39 33 33 28
4 49 42 52 44 43 36
6 62 53 66 56 53 44
10 85 73 90 78 71 58
16 110 94 115 99 91 75
25 146 124 152 131 116 96
35 180 154 188 162 139 115
50 219 187 228 197 164 135
70 279 238 291 251 203 167
95 338 289 354 304 239 197
120 392 335 410 353 271 223
150 451 386 472 406 306 251
185 515 441 539 463 343 281
300 698 599 732 628 446 365
400 787 673 847 728

Table 4H1A PVC Insulation / Aluminium / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4H1A
  • Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
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
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
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
50 93 84 118 104 125 110 149 133 128 169 152
70 118 107 150 133 160 140 192 173 166 217 196
95 142 129 181 161 195 170 235 212 203 265 241
120 164 149 210 186 226 197 273 247 237 308 282
150 189 170 234 204 261 227 316 287 274 356 327
185 215 194 266 230 298 259 363 330 316 407 376
240 252 227 312 269 352 305 430 392 375 482 447
300 289 261 358 306 406 351 497 455 434 557 519
380 413 352 511 472 543 502 507 625 584
480 477 405 591 546 629 582 590 726 680
600 545 462 679 626 722 669 680 837 787
740 771 709 820 761 776 956 902
960 900 823 953 886 907 1125 1066
1200 1022 926 1073 999 1026 1293 1229

Table 4H2A PVC Insulation / Aluminium / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4H2A
  • Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7 8 9
16 44 41 54 48 66 59 73 61
25 58 53 71 62 83 73 89 78
35 71 65 86 77 103 90 111 96
50 86 78 104 92 125 110 135 117
70 108 98 131 116 160 140 173 150
95 130 118 157 139 195 170 210 183
120 135 160 197 212
150 155 176 227 245
185 176 199 259 280
240 207 232 305 330
300 237 265 351 381

Table 4H3A PVC Insulation / Aluminium / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4H3A
  • Single-core armoured 70 °C thermoplastic insulated cables
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
Touching Touching Spaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC 2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
Horizontal Vertical Horizontal Vertical Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
50 143 133 152 141 131 167 157 168 159 169 155
70 183 168 194 178 168 214 202 212 200 213 196
95 221 202 234 214 205 261 247 259 245 255 236
120 255 233 270 246 238 303 288 299 285 293 272
150 294 267 310 282 275 349 333 340 323 335 312
185 334 303 352 319 315 400 382 389 371 379 354
240 393 354 413 374 372 472 452 457 437 443 415
300 452 405 474 427 430 545 523 520 498 505 475
380 518 452 543 479 497 638 613 583 559 551 518
480 586 501 616 534 568 742 715 655 629 604 568
600 658 550 692 589 642 859 828 724 696 656 618
740 728 596 769 642 715 986 952 802 770 707 666
960 819 651 868 706 808 1171 1133 866 832 770 726
1200 893 692 952 756 880 1360 1317 938 902 822 774

Table 4H4A PVC Insulation / Aluminium / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4H4A
  • Multi-core armoured 70 °C thermoplastic insulated cables
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
 
1 2 3 4 5 6 7
16 68 58 71 61
25 89 76 94 80 77 64
35 109 94 115 99 93 77
50 131 113 139 119 109 91
70 165 143 175 151 135 112
95 199 174 211 186 159 132
120 202 216 1502
150 232 250 169
185 265 287 190
240 312 342 218
300 360 399 247

Table 4J1A XLPE Insulation / Aluminium / Single-core / Non-armoured - IEE

  • Standard:BS 7671
  • Table 4J1A
  • Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
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
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
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
50 125 113 157 140 154 136 184 165 159 210 188
70 158 142 200 179 198 174 237 215 206 271 244
95 191 171 242 217 242 211 289 264 253 332 300
120 220 197 281 251 280 245 337 308 296 387 351
150 253 226 307 267 324 283 389 358 343 448 408
185 288 256 351 300 371 323 447 413 395 515 470
240 338 300 412 351 439 382 530 492 471 611 561
300 387 344 471 402 508 440 613 571 544 708 652
380 658 594 679 628 638 798 742
480 765 692 786 728 743 927 865
600 871 791 903 836 849 1058 990
740 1001 911 1025 951 979 1218 1143
960 1176 1072 1191 1108 1151 1440 1355
1200 1333 1217 1341 1249 1307 1643 1550

Table 4J2A XLPE Insulation / Aluminium / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4J2A
  • Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7 8 9
16 60 55 72 64 84 76 91 77
25 78 71 94 84 101 90 108 97
35 96 87 115 103 126 112 135 120
50 115 104 138 124 154 136 164 146
70 145 131 175 156 198 174 211 187
95 175 157 210 188 241 211 257 227
120 180 216 245 263
150 206 240 283 304
185 233 272 323 347
240 273 318 382 409
300 313 364 440 471

Table 4J3A XLPE Insulation / Aluminium / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4J3A
  • Single-core armoured 90 °C thermosetting insulated cables
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
Touching Touching Spaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC 2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
Horizontal Vertical Horizontal Vertical Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
50 179 165 192 176 162 216 197 212 199 215 192
70 228 209 244 222 207 275 253 269 254 270 244
95 276 252 294 267 252 332 307 328 310 324 296
120 320 291 340 308 292 384 357 378 358 372 343
150 368 333 390 352 337 441 411 429 409 424 394
185 419 378 444 400 391 511 480 490 467 477 447
240 494 443 521 468 465 605 572 576 549 554 523
300 568 508 597 536 540 701 666 654 624 626 595
380 655 573 688 608 625 812 780 735 704 693 649
480 747 642 786 685 714 942 906 825 790 765 717
600 836 706 880 757 801 1076 1036 909 872 832 780
740 934 764 988 824 897 1250 1205 1204 989 890 835
960 1056 838 1121 911 1014 1488 1435 1094 1052 970 911
1200 1163 903 1236 990 1118 1715 1658 1187 1141 1043 980

Table 4J4A XLPE Insulation / Aluminium / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4J4A
  • Multi-core armoured 90 °C thermosetting insulated cables
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 2 3 4 5 6 7
16 82 71 85 74 71 59
25 108 92 112 98 90 75
35 132 113 138 120 108 90
50 159 137 166 145 128 106
70 201 174 211 185 158 130
95 242 214 254 224 186 154
120 249 264 174
150 284 305 197
185 328 350 220
240 386 418 253
300 441 488 286