Duct Bank Ampacity – Table D11A (Copper)
Allowable Copper conductor ampacities for cables rated not more than 5000 V and unshielded for the
installation configurations of Diagram D11
installation configurations of Diagram D11
| Size | 1/Phase | 75 C Derating | 2/Phase | 75 C Derating | 3/Phase | 75 C Derating | 4/Phase | 75 C Derating | 5/Phase | 75 C Derating | 6/Phase | 75 C Derating | 8/Phase | 75 C Derating |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/0 | 205 | 182 | 185 | 164 | 169 | 150 | 158 | 140 | 147 | 130 | 139 | 123 | 130 | 115 |
| 2/0 | 233 | 206 | 210 | 186 | 192 | 170 | 179 | 159 | 166 | 147 | 157 | 139 | 147 | 130 |
| 3/0 | 266 | 236 | 239 | 212 | 218 | 193 | 202 | 179 | 188 | 167 | 178 | 158 | 166 | 147 |
| 4/0 | 303 | 268 | 271 | 240 | 247 | 219 | 229 | 203 | 212 | 188 | 201 | 178 | 187 | 166 |
| 250 | 335 | 297 | 298 | 264 | 271 | 240 | 251 | 222 | 232 | 206 | 219 | 194 | 204 | 181 |
| 300 | 370 | 328 | 329 | 291 | 298 | 264 | 276 | 245 | 255 | 226 | 241 | 214 | 224 | 198 |
| 350 | 403 | 357 | 357 | 316 | 323 | 286 | 299 | 265 | 276 | 245 | 261 | 231 | 242 | 214 |
| 400 | 434 | 385 | 384 | 340 | 347 | 307 | 320 | 284 | 295 | 261 | 279 | 247 | 259 | 229 |
| 500 | 489 | 433 | 430 | 381 | 388 | 344 | 357 | 316 | 329 | 291 | 310 | 275 | 288 | 255 |
| 600 | 539 | 478 | 472 | 418 | 424 | 376 | 390 | 346 | 359 | 318 | 339 | 300 | 314 | 278 |
| 750 | 601 | 532 | 524 | 464 | 470 | 416 | 431 | 382 | 397 | 352 | 374 | 331 | 346 | 307 |
| 900 | 655 | 580 | 569 | 504 | 509 | 451 | 466 | 413 | 428 | 379 | 403 | 357 | 373 | 330 |
| 1000 | 683 | 605 | 593 | 525 | 530 | 470 | 485 | 430 | 445 | 394 | 419 | 371 | 388 | 344 |
| 1250 | 752 | 666 | 649 | 575 | 578 | 512 | 528 | 468 | 484 | 429 | 455 | 403 | 421 | 373 |
| 1500 | 804 | 712 | 691 | 612 | 614 | 544 | 561 | 497 | 513 | 455 | 482 | 427 | 445 | 394 |
| 1750 | 847 | 750 | 726 | 643 | 644 | 571 | 587 | 520 | 537 | 476 | 504 | 447 | 466 | 413 |
| 2000 | 901 | 798 | 744 | 659 | 659 | 584 | 601 | 532 | 549 | 486 | 515 | 456 | 476 | 422 |
Disclaimer: Consultation with a Professional Advised
The information provided here is for general informational purposes only and should not be considered as professional advice. It is essential to consult with a qualified professional or specialist before making any decisions based on the information provided. Individual circumstances and requirements vary, and a professional can provide personalized advice tailored to your specific situation. Reliance on any information provided herein is solely at your own risk.