skip to main content
A wide range of  
high quality cables  

Current Carrying Capacity Single Core Cables -BS 7211

CURRENT CARRYING CAPACITY: SINGLE CORE CABLES-COPPER CONDUCTORS TO BS 7211 & 7889

CONDUCTOR REFERENCE METHOD 4 REFERENCE METHOD 3 REFERENCE METHOD 1 REFERENCE METHOD 11 REFERENCE METHOD 12 (FREE AIR)
CROSS SECTIONAL enclosed in conduit in enclosed in conduit on a clipped direct on a perforated cable tray horizontal vertical flat
AREA thermally insulating wall etc wall or in trunking etc horizontal or vertical flat spaced spaced Trefoil
                       
                       
          2 cables 3 or 4 2 cables 3 or 4 2 cables 2 cables 3 cable
  2 cables 3 or 4 2 cables 3 or 4 single phase cables three single phase cables three single phase single phase trefoil
  single phase cables three single phase cables three a.c or d.c phase a.c a.c or d.c phase a.c a.c or d.c or 3 a.c or d.c or 3 three phase
  A.C or D.C phase a.c A.C or D.C phase a.c flat touching flat touching flat touching flat touching cable tree phase cable tree phase A.C
            or trefoil   or trefoil      
mm2 A A A A A A A A A A A
1 14 13 17 15 19 17.5 - - - - -
1.5 18 17 22 19 25 23 - - - - -
2.5 24 23 30 26 34 31 - - - - -
4 33 30 40 35 46 41 - - - - -
6 43 39 51 45 59 54 - - - - -
10 58 53 71 63 81 74 - - - - -
16 76 70 95 85 109 99 - - - - -
25 100 91 126 111 143 130 158 140 183 163 138
35 124 111 156 138 176 161 195 176 226 203 171
50 149 135 189 168 228 209 293 215 274 246 209
70 189 170 240 214 293 268 308 279 351 318 270
95 228 205 290 259 355 326 375 341 426 389 330
120 263 235 336 299 413 379 436 398 495 453 385
150 300 270 375 328 476 436 505 461 570 524 445
185 341 306 426 370 545 500 579 530 651 600 511
240 400 358 500 433 644 590 686 630 769 711 606
300 459 410 573 493 743 681 794 730 886 824 701
400 - - 683 584 868 793 915 849 1065 994 820
500 - - 783 666 990 904 1044 973 1228 1150 936
630 - - 900 764 1130 1033 1191 1115 1423 1338 1069
800 - - - - 1288 1179 1358 1275 1581 1485 1214
1000 - - - - 1443 1323 1520 1436 1775 1671 1349

REFERENCE METHODS OF INSTALLATION ARE DESCRIBED IN IEEE REGULATIONS & B.S. 7671

Current Carrying Capacity of Flexible cables to BS 7211 would be same as above when used in FIXED INSTALLATIONS.

More cable technical data.