Table 4D1A

Single-core 70°C Thermoplastic Insulated Cables, Non-Armoured, with or without Sheath

Ambient Temperature: 30°C

Conductor Operating Temperature: 70°C

Current-carrying Capacity (amperes):

Conductor
cross-sectional
area
Reference Method A (enclosed in conduit in thermally insulating 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 on a perforated cable tray horizontal or vertical etc.)
Touching Spaced by one diameter
2 cables, single-phase a.c. or d.c. 3 or 4 cables, three-phase a.c. 2 cables, single-phase a.c. or d.c. 3 or 4 cables, three-phase a.c. 2 cables, single-phase a.c. or d.c. flat and touching 3 or 4 cables, three-phase a.c. flat and touching or trefoil 2 cables, single-phase a.c. or d.c. flat 3 cables, three-phase a.c. flat 3 cables, three-phase a.c. trefoil 2 cables, single-phase a.c. or d.c. or 3 cables three-phase a.c. flat
Horizontal Vertical
1 2 3 4 5 6 7 8 9 10 11 12
(mm2) (A) (A) (A) (A) (A) (A) (A) (A) (A) (A) (A)
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 59 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 1,005 905 855 1,138 1,070
800 1,030 943 1,086 1,020 971 1,265 1,188
1000 1,154 1,058 1,216 1,149 1,079 1,420 1,337

Note:

For cables having flexible conductors, see adjustment factors for current-carrying capacity and voltage drop.

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