Metallnotierungen vom 23.07.2021: Current-carrying capacity PVC-insulated LV cables
according to HD 603 S1, part 3G and HD 627 S1, part 4H
General
This section applies to the current-carrying capacity under both standard and deviating provisions provided that the
cables are in three-phase operation with three conductors loaded or one single-core cable in d.c.-operation.
The rated current-carrying capacity are valid under standard provisions.
Basic provisions
| Temperatures °C (conductor) | |
|---|---|
| Maximum permissible operating temperature | +70 |
| Maximum short-circuit temperature for cross sections area ≤300 mm² for cross sections area >300 mm² |
+160 +140 |
Concentric conductors bonded at both ends.
Power frequency 50 Hz.
The tabulated rated current-carrying capacities are based on standard provisions such as:
– operating mode
– laying conditions
– environmental conditions
For deviating operating conditions the current-carrying capacities in the tables are to be multiplied by appropriate conversion factors which shall be based on the same calculation method and operating conditions as used for the current-carrying capacity given in this clause.
Current-carrying capacity PVC-insulated LV cables
Cables in earth (20°C)
| NYY NY2Y |
NYCY / NYCWY NYC2Y / NYCW2Y |
NAYY NAY2Y |
NAYCY / NAYCWY NAYC2Y / NAYCW2Y |
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| Number of loaded conductors |
3 | 3 | 1 | 3 | 3 | 3 | 3 | 1 | 3 | 3 |
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| Cross-sectional area in mm² |
Copper conductor Rated current in A |
Aluminium conductor Rated current in A |
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| 1,5 2,5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800 1000 |
30 39 50 62 83 107 138 164 195 238 286 325 365 413 479 541 614 693 777 859 936 |
27 36 47 59 79 102 133 159 188 232 280 318 359 406 473 535 613 687 – – – |
41 55 71 90 124 160 208 250 296 365 438 501 563 639 746 848 975 1125 1304 1507 1715 |
31 40 51 63 84 108 139 166 196 238 281 315 347 385 432 473 521 574 636 – – |
27 36 47 59 79 102 133 160 190 234 280 319 357 402 463 518 579 624 – – – |
– – – – – – 106 127 151 185 222 253 284 322 375 425 487 558 635 716 796 |
– – – – – – 102 123 144 179 215 245 275 313 364 419 484 553 – – – |
– – – – – – 160 193 230 283 340 389 436 496 578 656 756 873 1011 1166 1332 |
– – – – – – 108 129 153 187 223 252 280 314 358 397 441 489 539 – – |
– – – – – – 103 123 145 180 216 246 276 313 362 415 474 528 – – – |
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*) Rated current for cables in d.c. systems with return conductor far away.
Current-carrying capacity PVC-insulated LV cables
Cables in air (30°C)
| NYY NY2Y |
NYCY / NYCWY NYC2Y / NYCW2Y |
NAYY NAY2Y |
NAYCY / NAYCWY NAYC2Y / NAYCW2Y |
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| Number of loaded conductors |
3 | 3 | 1 | 3 | 3 | 3 | 3 | 1 | 3 | 3 |
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| Cross-sectional area in mm² |
Copper conductor Rated current in A |
Aluminium conductor Rated current in A |
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| 1,5 2,5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800 1000 |
21 28 37 47 64 84 114 139 169 213 264 307 352 406 483 557 646 747 858 971 1078 |
19,5 25 34 43 59 79 106 129 157 199 246 285 326 374 445 511 597 669 – – – |
27 35 47 59 81 107 144 176 214 270 334 389 446 516 618 717 843 994 1180 1396 1620 |
22 29 39 49 67 89 119 146 177 221 270 310 250 399 462 519 583 657 744 – – |
19,5 26 34 44 60 80 108 132 160 202 249 289 329 377 443 504 577 626 – – – |
– – – – – – 87 107 131 166 205 239 273 317 378 437 513 600 701 809 916 |
– – – – – – 82 100 119 152 186 216 246 285 338 400 472 539 – – – |
– – – – – – 110 135 166 210 259 302 345 401 479 555 653 772 915 1080 1258 |
– – – – – – 91 112 137 173 212 247 280 321 374 426 488 556 628 – – |
– – – – – – 83 101 121 155 189 220 149 287 339 401 468 524 – – – |
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*) Rated current for cables in d.c. systems with return conductor far away.
Current-carrying capacity PVC-insulated LV cables
Permissible short-circuit temperatures and rated short-time current densities
| Cables with | Permissible shortcircuit temperature in °C |
Rated short-time current density in A/mm² for a rated short-circuit duration of 1 s |
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| Conductor temperature at the beginning of short-circuit in °C | |||||||
| 70 | 60 | 50 | 40 | 30 | 20 | ||
| Copper conductors | |||||||
| ≤ 300 mm² | 160 | 115 | 122 | 129 | 139 | 143 | 150 |
| > 300 mm² | 140 | 103 | 111 | 118 | 126 | 133 | 140 |
| Aluminium conductors | |||||||
| ≤ 300 mm² | 160 | 76 | 81 | 85 | 90 | 95 | 99 |
| > 300 mm² | 140 | 68 | 73 | 78 | 83 | 88 | 93 |
Current-carrying capacity multicore cables
Group rating factors for multicore cables with different number of loaded cores
Bei drei belasteten Adern gilt:
HD 603, Teil 3, Hauptabschnitt G, Abschnitt V (Strombelastbarkeit) und Abschnitt VI (Anhang), Tabelle 14 und Tabelle 15 (Belastbarkeit, Kabel in Erde / in Luft), in beiden Tabellen Spalte 3 und Spalte 5 für Kabel mit PVC-Isolierung
und
HD 603, Teil 5, Hauptabschnitt G, Abschnitt V (Strombelastbarkeit) und Abschnitt VI (Anhang), Tabelle 14 und Tabelle 15 (Belastbarkeit, Kabel in Erde / in Luft), in beiden Tabellen Spalte 3 und Spalte 5 für Kabel mit VPE-Isolierung.
Group rating factors for multicore cables with different number of loaded cores
according to HD 627 S1, part 4H, table A.1
| Number of loaded cores | Cables in earth | Cables in air |
|---|---|---|
| 5 7 10 14 19 24 40 61 |
0,70 0,60 0,50 0,45 0,40 0,35 0,30 0,25 |
0,75 0,65 0,55 0,50 0,45 0,40 0,35 0,30 |