ELECTRICAL
Current Carrying Capacity
Current Carrying Capacity
NOMINAL CROSS SECTIONAL AREA mm² |
REFERENCE METHOD C (CLIPPED DIRECT) Amps |
REFERENCE METHOD F (IN FREE AIR OR ON A PERFORATED CABLE TRAY, HORIZONTAL OR VERTICAL) Amps |
NOMINAL CROSS SECTIONAL AREA mm² |
REFERENCE METHOD C (CLIPPED DIRECT) Amps |
REFERENCE METHOD F (IN FREE AIR OR ON A PERFORATED CABLE TRAY, HORIZONTAL OR VERTICAL) Amps |
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 Single-Phase AC |
3 or 4 Cables Three-Phase AC |
| Horizontal |
Vertical |
Horizontal |
Vertical |
Horizontal |
Vertical |
| 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 |
346 |
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 |
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
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
VOLTAGE DROP
NOMINAL CROSS SECTIONAL AREA mm² |
TWO CORE CABLE DC |
REFERENCE METHOD C & F (CLIPPED DIRECT, ON TRAY OR IN FREE AIR) mV/A/m |
NOMINAL CROSS SECTIONAL AREA mm² |
TWO CORE CABLE DC |
REFERENCE METHOD C & F (CLIPPED DIRECT, ON TRAY OR IN FREE AIR) mV/A/m |
| 2 Cables Single-Phase AC |
3 or 4 Cables Three-Phase AC |
| Touching |
Spaced* |
Trefoil and Touching |
Flat and Touching |
Flat and Spaced* |
| r |
x |
z |
r |
x |
z |
r |
x |
z |
r |
x |
z |
r |
x |
z |
| 50 |
0/98 |
0/99 |
0/21 |
1 |
0/98 |
0/29 |
1 |
0/86 |
0/18 |
0/87 |
0/84 |
0/25 |
0/88 |
0/84 |
0/33 |
0/9 |
| 70 |
0/67 |
0/68 |
0/2 |
0/71 |
0/69 |
0/29 |
0/75 |
0/59 |
0/17 |
0/62 |
0/6 |
0/25 |
0/65 |
0/62 |
0/32 |
0/7 |
| 95 |
0/49 |
0/51 |
0/195 |
0/55 |
0/53 |
0/28 |
0/6 |
0/44 |
0/17 |
0/47 |
0/46 |
0/24 |
0/52 |
0/49 |
0/31 |
0/58 |
| 120 |
0/39 |
0/41 |
0/19 |
0/45 |
0/43 |
0/27 |
0/51 |
0/35 |
0/165 |
0/39 |
0/38 |
0/24 |
0/44 |
0/41 |
0/3 |
0/51 |
| 150 |
0/31 |
0/33 |
0/185 |
0/38 |
0/36 |
0/27 |
0/45 |
0/29 |
0/16 |
0/33 |
0/31 |
0/23 |
0/39 |
0/34 |
0/29 |
0/45 |
| 185 |
0/25 |
0/27 |
0/185 |
0/33 |
0/3 |
0/26 |
0/4 |
0/23 |
0/16 |
0/28 |
0/26 |
0/23 |
0/34 |
0/29 |
0/29 |
0/41 |
| 240 |
0/195 |
0/21 |
0/18 |
0/28 |
0/24 |
0/26 |
0/35 |
0/18 |
0/155 |
0/24 |
0/21 |
0/22 |
0/3 |
0/24 |
0/28 |
0/37 |
| 300 |
0/155 |
0/17 |
0/175 |
0/25 |
0/195 |
0/25 |
0/32 |
0/145 |
0/15 |
0/21 |
0/17 |
0/22 |
0/28 |
0/2 |
0/27 |
0/34 |
| 400 |
0/115 |
0/145 |
0/17 |
0/22 |
0/18 |
0/24 |
0/3 |
0/125 |
0/15 |
0/195 |
0/16 |
0/21 |
0/27 |
0/2 |
0/27 |
0/33 |
| 500 |
0/093 |
0/125 |
170 |
0/21 |
0/165 |
0/24 |
0/29 |
0/105 |
0/145 |
0/18 |
0/145 |
0/2 |
0/25 |
0/19 |
0/24 |
0/31 |
| 630 |
0/073 |
0/105 |
0/165 |
0/195 |
0/15 |
0/23 |
0/27 |
0/092 |
0/145 |
0/17 |
0/135 |
0/195 |
0/24 |
0/175 |
0/23 |
0/29 |
| 800 |
0/056 |
0/09 |
0/16 |
0/19 |
0/145 |
0/23 |
0/27 |
0/086 |
0/14 |
0/165 |
0/13 |
0/18 |
0/23 |
0/175 |
0/195 |
0/26 |
| 1000 |
0/045 |
0/092 |
0/155 |
0/18 |
0/14 |
0/21 |
0/25 |
0/08 |
0/135 |
0/155 |
0/125 |
0/17 |
0/21 |
0/165 |
0/18 |
0/24 |