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Table 4D1A - Single-core 70°C Thermoplastic Insulated Cables, Non-Armoured, with or without Sheath

    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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