Current-carrying capacity XLPE-insulated LV cables

according to HD 603 S1, part 5G 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
Maximum permissible operating temperature +90
Maximum short-circuit temperature +250

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 XLPE-insulated LV cables

Cables in earth (20°C)

Recommended values according to HD 603 S1, part 5G, table 14

N2XY
N2X2Y
N2XCY / N2XC2Y
N2XCWY / N2XCW2Y
NA2XY
NA2X2Y
NA2XCY / NA2XCWY
NA2XC2Y / NA2XCW2Y
*) *)
Number of
loaded
conductors
3 3 1 3 3 3 3 1 3 3
Cross-sectional
area in mm²
Copper conductor
Rated current in A
Aluminium conductor
Rated current in A
1,5
2,5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
33
42
54
67
89
115
148
177
209
256
307
349
393
445
517
583
663
749
843
935
1023
31
40
52
64
86
112
145
174
206
254
305
348
392
444
517
585
671
758


48
63
82
102
136
176
229
275
326
400
480
548
616
698
815
927
1064
1227
1421
1638
1869
33
43
55
68
91
117
150
179
211
257
304
341
377
418
469
514
565
623
690

31
40
52
65
87
113
146
176
208
256
307
349
391
442
509
569
637
691








114
136
162
199
238
272
305
347
404
457
525
601
687
776
865






112
135
158
196
234
268
300
342
398
457
529
609








177
212
252
310
372
425
476
541
631
716
825
952
1102
1267
1448






116
138
164
201
240
272
303
340
387
430
479
531
587







113
136
159
197
236
269
302
342
397
454
520
584


*) Rated current for cables in d.c. systems with return conductor far away.

Current-carrying capacity XLPE-insulated LV cables

Cables in air (30°C)

Recommended values according to HD 603 S1, part 5G, table 15

N2XY
N2X2Y
N2XCY / N2XC2Y
N2XCWY / N2XCW2Y
NA2XY
NA2X2Y
NA2XCY / NA2XCWY
NA2XC2Y / NA2XCW2Y
*) *)
Number of
loaded
conductors
3 3 1 3 3 3 3 1 3 3
Cross-sectional
area in mm²
Copper conductor
Rated current in A
Aluminium conductor
Rated current in A
1,5
2,5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
26
34
44
56
77
102
138
170
207
263
325
380
437
507
604
697
81
940
1083
1228
1368
24
32
42
53
74
98
133
162
197
250
308
359
412
475
564
649
761
866


33
43
57
72
99
131
177
217
265
336
415
485
557
646
774
901
1060
1252
1486
1751
2039
27
36
47
59
81
109
146
179
218
275
336
388
438
501
580
654
733
825
934

25
33
43
54
75
100
136
165
201
255
314
364
416
480
565
643
737
807








106
130
161
204
252
295
339
395
472
547
643
754
882
1019
1157






102
126
149
191
234
273
311
360
427
507
600
695








136
166
205
260
321
376
431
501
600
696
821
971
1151
1355
1580






112
137
169
214
263
308
349
401
469
535
615
700
790







104
128
152
194
239
278
316
365
430
506
575
682


*) Rated current for cables in d.c. systems with return conductor far away.

Current-carrying capacity XLPE-insulated LV cables

Permissible short-circuit temperatures and rated short-time current densities

Recommended values according to HD 603 S1, part 3G, table17

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
90 80 70 60 50 40 30 20
Copper conductors 250 143 149 155 159 165 170 176 181
Aluminium conductors 250  94 98 102 105 109 113 116 120

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