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You are here: Home / Cable / Technical Tables / Useful Info / Table 4E1A

Table 4E1A

Single-Core 90°C Thermosetting Insulated Cables, Non-Armoured, with or without Sheath

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)
Spaced by one cable diameter
Reference Method F (in free air or on a perforated cable tray etc horizontal or vertical etc.) Reference Method G (in free air)
Touching Spaced by one cable 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 14 13 17 15 19 17.5 – – – – –
1.5 19 17 23 20 25 23 – – – – –
2.5 26 23 31 28 34 31 – – – – –
4 35 31 42 37 46 41 – – – – –
6 45 40 54 48 59 54 – – – – –
10 61 54 75 66 81 74 – – – – –
16 81 73 100 88 109 99 – – – – –
25 106 95 133 117 143 130 161 141 135 182 161
35 131 117 164 144 176 161 200 176 169 226 201
50 158 141 198 175 228 209 242 216 207 275 246
70 200 179 253 222 293 268 310 279 268 353 318
95 241 216 306 269 355 326 377 342 328 430 389
120 278 249 354 312 413 379 437 400 383 500 454
150 318 285 393 342 476 4036 504 464 444 577 527
185 362 324 449 384 545 500 575 533 510 661 605
240 424 380 528 450 644 590 679 634 607 781 719
300 486 435 603 514 743 681 783 736 703 902 833
400 – – 683 584 868 793 940 868 823 1,085 1,008
500 – – 783 666 990 904 1,083 998 946 1,253 1,169
630 – – 900 764 1,130 1,033 1,254 1,151 1,088 1,454 1,362
800 – – – – 1,288 1,179 1,358 1,275 1,214 1,581 1,485
1,000 – – – – 1,443 1,323 1,520 1,436 1,349 1,775 1,671
  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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