EPR/XLPE Current Ratings (Copper)

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Current ratings are based on values given in IEC 60364-5-52 (2009), with a reference conductor temperature of 70oC, ambient temperature of 30oC and soil temperature of 20oC.

Two Loaded Conductors

Size ([math]mm^{2}[/math]) Current Rating for 2 x EPR or XLPE Insulated Copper Conductors
Reference Installation Method
A1 A2 B1 B2 C D1 D2 E F
1.5 19 18.5 23 22 24 25 27 26
2.5 26 25 31 30 33 33 35 36
4 35 33 42 40 45 43 46 49
6 45 42 54 51 58 53 58 63
10 61 57 75 69 80 71 77 86
16 81 76 100 91 107 91 100 115
25 106 99 133 119 138 116 129 149 161
35 131 121 164 146 171 139 155 185 200
50 158 145 198 175 209 164 183 225 242
70 200 183 253 221 269 203 225 289 310
95 241 220 306 265 328 239 270 352 377
120 278 253 354 305 382 271 306 410 437
150 318 290 393 334 441 306 343 473 504
185 362 329 449 384 506 343 387 542 575
240 424 386 528 459 599 395 448 641 679
300 486 442 603 532 693 446 502 741 783
400 940
500 1083
630 1254

Three Loaded Conductors

Size ([math]mm^{2}[/math]) Current Rating for 3 x EPR or XLPE Insulated Copper Conductors
Reference Installation Method
A1 A2 B1 B2 C D1 D2 E F G
Trefoil Laid Flat Horizontal Vertical
1.5 17 16.5 20 19.5 22 21 23 23
2.5 23 22 28 26 30 28 30 32
4 31 30 37 35 40 36 39 42
6 40 38 48 44 52 44 49 54
10 54 51 66 60 71 58 65 75
16 73 68 88 80 96 75 84 100
25 95 89 117 105 119 96 107 127 135 141 182 161
35 117 109 144 128 147 115 129 158 169 176 226 201
50 141 130 175 154 179 135 153 192 207 216 275 246
70 179 164 222 194 229 167 188 246 268 279 353 318
95 216 197 269 233 278 197 226 298 328 342 430 389
120 249 227 312 268 322 223 257 346 383 400 500 454
150 285 259 342 300 371 251 287 399 444 464 577 527
185 324 295 384 340 424 281 324 456 510 533 661 605
240 380 346 450 398 500 324 375 538 607 634 781 719
300 435 396 514 455 576 365 419 621 703 736 902 833
400 823 868 1085 1008
500 946 998 1253 1169
630 1088 1151 1454 1362

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