Current-carrying capacity PVC-insulated LV cables
according to HD 603 S1, part 3G and HD 627 S1, part 4H
Annotation
If reference is made to these tables for Bayka cables, they apply analogously and not only to the types specifically listed in the tables. (E.g. for products with insulation materials other than PVC, which have at least 70°C maximum conductor temperature, reference can be made to these tables.)
Notes on column selection are shown in [].
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 | +160 |
Maximum short-circuit temperature for cross sections area >300 mm² | +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)
permissible operating temperature | 70°C | ||||||||||
NYY NY2Y [copper, without concentric conductor] |
NYCY / NYCWY NYC2Y / NYCW2Y [copper, with concentric conductor] |
NAYY NAY2Y [aluminium, without concentric conductor] |
NAYCY / NAYCWY NAYC2Y / NAYCW2Y [aluminium, with concentric conductor] |
||||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
||
Number of loaded conductors |
1 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 3 | 3 |
|
Cross-sectional area in mm² |
Copper conductor Rated current in A |
Aluminium conductor Rated current in A |
|||||||||
1,5 | 41 | 27 | 30 | 27 | 31 | – | – | – | – | – | |
2,5 | 55 | 36 | 39 | 36 | 40 | – | – | – | – | – | |
4 | 71 | 47 | 50 | 47 | 51 | – | – | – | – | – | |
6 | 60 | 59 | 62 | 59 | 63 | – | – | – | – | – | |
10 | 124 | 79 | 83 | 79 | 84 | – | – | – | – | – | |
16 | 160 | 102 | 107 | 102 | 108 | – | – | – | – | – | |
25 | 208 | 133 | 138 | 133 | 139 | 160 | 102 | 106 | 103 | 108 | |
35 | 250 | 159 | 164 | 160 | 166 | 193 | 123 | 127 | 123 | 129 | |
50 | 296 | 188 | 195 | 190 | 196 | 230 | 144 | 151 | 145 | 153 | |
70 | 365 | 232 | 238 | 234 | 238 | 283 | 179 | 185 | 180 | 187 | |
95 | 438 | 280 | 286 | 280 | 281 | 340 | 215 | 222 | 216 | 223 | |
120 | 501 | 318 | 325 | 319 | 315 | 389 | 245 | 253 | 246 | 252 | |
150 | 563 | 359 | 365 | 357 | 347 | 436 | 275 | 284 | 276 | 280 | |
185 | 639 | 406 | 413 | 402 | 385 | 496 | 313 | 322 | 313 | 314 | |
240 | 746 | 473 | 479 | 463 | 432 | 578 | 364 | 375 | 362 | 358 | |
300 | 848 | 535 | 541 | 518 | 473 | 656 | 419 | 425 | 415 | 397 | |
400 | 957 | 613 | 614 | 579 | 521 | 756 | 484 | 487 | 474 | 441 | |
500 | 1125 | 687 | 693 | 624 | 574 | 873 | 553 | 558 | 528 | 489 | |
630 | 1304 | – | 777 | – | 636 | 1011 | – | 635 | – | 539 | |
800 | 1507 | – | 859 | – | – | 1166 | – | 716 | – | – | |
1000 | 1715 | – | 936 | – | – | 1332 | – | 796 | – | – |
*) 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)
permissible operating temperature | 70°C | ||||||||||
NYY NY2Y [copper without concentric conductor] |
NYCY / NYCWY NYC2Y / NYCW2Y [copper, with concentric conductor] |
NAYY NAY2Y [aluminium, without concentric conductor] |
NAYCY / NAYCWY NAYC2Y / NAYCW2Y [aluminium, with concentric conductor] |
||||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
||
Number of loaded conductors |
1 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 3 | 3 |
|
Cross-sectional area in mm² |
Copper conductor Rated current in A |
Aluminium conductor Rated current in A |
|||||||||
1,5 | 27 | 19,5 | 21 | 19,5 | 22 | – | – | – | – | – | |
2,5 | 35 | 25 | 28 | 26 | 29 | – | – | – | – | – | |
4 | 47 | 34 | 37 | 34 | 39 | – | – | – | – | – | |
6 | 59 | 43 | 47 | 44 | 49 | – | – | – | – | – | |
10 | 81 | 59 | 64 | 60 | 67 | – | – | – | – | – | |
16 | 107 | 79 | 84 | 80 | 89 | – | – | – | – | – | |
25 | 144 | 106 | 114 | 108 | 119 | 110 | 82 | 87 | 83 | 91 | |
35 | 176 | 129 | 139 | 132 | 146 | 135 | 100 | 107 | 101 | 112 | |
50 | 214 | 157 | 169 | 160 | 177 | 166 | 119 | 131 | 121 | 137 | |
70 | 270 | 199 | 213 | 202 | 221 | 210 | 152 | 166 | 155 | 173 | |
95 | 334 | 246 | 264 | 249 | 270 | 259 | 186 | 205 | 189 | 212 | |
120 | 389 | 285 | 307 | 289 | 310 | 302 | 216 | 239 | 220 | 247 | |
150 | 446 | 326 | 352 | 329 | 350 | 345 | 246 | 273 | 249 | 280 | |
185 | 516 | 374 | 406 | 377 | 399 | 401 | 285 | 317 | 287 | 321 | |
240 | 618 | 445 | 483 | 443 | 462 | 479 | 338 | 378 | 339 | 374 | |
300 | 717 | 511 | 557 | 504 | 519 | 555 | 400 | 437 | 401 | 426 | |
400 | 843 | 597 | 646 | 577 | 583 | 653 | 472 | 513 | 468 | 488 | |
500 | 994 | 669 | 747 | 626 | 657 | 772 | 539 | 600 | 524 | 556 | |
630 | 1180 | – | 858 | – | 744 | 915 | – | 701 | – | 628 | |
800 | 1396 | – | 971 | – | – | 1080 | – | 809 | – | – | |
1000 | 1620 | – | 1078 | – | – | 1258 | – | 916 | – | – |
*) 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 |
|||||||
Conductor temperature at the beginning of short-circuit in °C | |||||||||
70 | 60 | 50 | 40 | 30 | 20 | ||||
Copper conductors | |||||||||
≤ 300 mm² | 160 | 115 | 122 | 129 | 136 | 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 | 0,70 | 0,75 |
7 | 0,60 | 0,65 |
10 | 0,50 | 0,55 |
14 | 0,45 | 0,50 |
19 | 0,40 | 0,45 |
24 | 0,35 | 0,40 |
40 | 0,30 | 0,35 |
61 | 0,25 | 0,30 |