Table 4E4A

Multicore 90°C Thermosetting Insulated Cables

Current-carrying Capacity (amperes):

Air Ambient Temperature: 30°C
Ground Ambient Temperature: 20°C
Conductor Operating Temperature: 90°C

Conductor
cross-sectional

area
Reference Method C (clipped direct) Reference Method E (in free air or on a perforated cable tray etc, horizontal or vertical) Reference Method D (direct in ground or in ducting in ground, in or around buildings)
1 two-core cable single-phase a.c. or d.c. 1 three-or 1 four-core cable, three-phase a.c. 1 two-core cable single-phase a.c. or d.c. 1 three-or 1 four-core cable, three-phase a.c. 1 two-core cable single-phase a.c. or d.c. 1 three-or 1 four-core cable, three-phase a.c.
1 2 3 4 5 6 7
(mm2) (A) (A) (A) (A) (A) (A)
1.5 27 23 29 25 25 21
2.5 36 31 39 33 33 28
4 49 42 52 44 46 36
6 62 53 66 56 53 44
10 85 73 90 78 71 58
16 110 94 115 99 91 75
25 146 124 152 131 116 96
35 180 154 188 162 139 115
50 219 187 228 197 164 135
70 279 238 291 251 203 167
95 338 289 354 304 239 197
120 392 335 410 353 271 223
150 451 386 472 406 306 251
185 515 441 539 463 343 281
240 607 520 636 546 395 324
300 698 599 732 628 446 365
400 787 673 847 728

Notes:

  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).

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