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Table 4E2A - Multi-Core 90°C Thermosetting Insulated Cables and thermoplastic Sheathed Cables, Non-A

    Multi-Core 90°C Thermosetting Insulated Cables and thermoplastic Sheathed Cables, Non-Armoured

    Current-carrying Capacity (amperes):

    Ambient Temperature: 30°C
    Conductor Operating Temperature: 90°C
    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 E (free air or on a perforated cable tray etc horizontal or vertical)
    1 two-core cable*, single-phase a.c. or d.c. 1 three- or four-core cable*, three-phase a.c. 1 two-core cable*, single-phase a.c. or d.c. 1 three- or four-core cable*, three-phase a.c. 1 two-core cable*, single-phase a.c. or d.c. 1 three- or four-core cable*, three-phase a.c. 1 two-core cable*, single-phase a.c. or d.c. 1 three- or four-core cable*, three-phase a.c.
    1 2 3 4 5 6 7 8 9
    (mm2) (A) (A) (A) (A) (A) (A) (A) (A)
    1 14.5 13 17 15 19 14 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

    Notes:
    * With or without a protective conductor

    1. Where it is intended to connect the cables in this table to equipment or accessories designed to operate at a temperature lower than the maximum operating temperature of the cable, the cables should be rated at the maximum operating temperature of the equipment or accessory (see Regulation 512.1.5).
    2. Where it is intended to group a cable in this table with other cables, the cable should be rated at the lowest of the maximum operating temperatures of any of the cables in the group (see Regulation 512.1.5).
    3. For cables having flexible conductors see section 2.4 of this appendix for adjustment factors for current-carrying capacity and voltage drop.

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