Code designation (provisional)
Symbol |
Cable, Cable components |
E |
Energy, power cable |
A V NG, 3G NY C -J -0 R S M E F |
Copper conductors (no abbreviation) Aluminium conductors Conductor surface tinned Crosslinked halogen-free polymer compound Thermoplastic halogen-free polymer compound Concentric conductor or screen of copper Cable with green/yellow conductor Cable without green/yellow conductor Circular conductor Sector shaped conductor Stranded conductor Solid conductor Flexible stranded conductor |
ANNEX A
Guide to use
Specified cables according to HD 604 Part 5, Section К may be laid indoors or in air in buildings or sites where the effects of a fire (especially in crowded places, places with high value devices or security equipment) have to be reduced to a minimum.
Current-carrying capacity
Conductor temperature
The highest permissible temperature at the conductor is 90°C. The maximum temperature for short-circuit conditions is 170°C for thermoplastic polymer compounds and 250°C for crosslinked polymer compounds.
Current carrying capacity for long time operation
The values given in Table A.1 for current carrying capacity are based on the assumption of 30°C ambient air temperature and free circulation of air.
Conversion factors for grouping in air
For grouping of cables and cable systems the conversion factors, given in table A.2 or A.3 are valid.
Conversion factor for deviating air temperatures
For deviating ambient air temperatures the following factors are valid:
Ambient temperature °С |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
Conversion factor |
1.15 |
1.12 |
1.08 |
1.04 |
1.0 |
0.96 |
0.91 |
0.87 |
0.82 |
3. Permissible short-circuit temperature and rated short-time current densities
The values for permissible short-circuit temperature and rated short-time current densities are given in Table A.4 and A.5
Table АЛ
Rated current carrying capacity, cables in air
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
|
Permissible operating temperature 90* C |
||||
|
Arrangement |
0 |
0 |
OO |
|
000 |
|
Nominal cross section |
|
Rated current in A |
|
||
|
Copper conductors mm2 |
|
|
|
|
|
1 |
1,5 |
33 |
25 |
24 |
26 |
32 |
2 |
2,5 |
43 |
34 |
32 |
34 |
42 |
3 |
4 |
57 |
44 |
42 |
44 |
56 |
4 |
6 |
72 |
57 |
53 |
56 |
71 |
5 |
10 |
99 |
77 |
73 |
77 |
96 |
6 |
16 |
131 |
102 |
97 |
102 |
128 |
7 |
25 |
177 |
|
132 |
138 |
173 |
8 |
35 |
217 |
|
162 |
170 |
212 |
9 |
50 |
265 |
|
197 |
207 |
258 |
10 |
70 |
336 |
|
250 |
263 |
328 |
11 |
95 |
415 |
|
308 |
325 |
404 |
12 |
120 |
485 |
|
359 |
380 |
471 |
13 |
150 |
557 |
|
412 |
437 |
541 |
14 |
185 |
647 |
|
475 |
507 |
626 |
15 |
240 |
775 |
|
564 |
604 |
749 |
16 |
300 |
894 |
|
649 |
692 |
864 |
17 |
400 |
1061 |
|
761 |
812 |
1018 |
18 |
500 |
1254 |
|
860 |
940 |
1173 |
|
Nominal cross section |
|
■ Rated in current in A |
|
||
|
Al-conductors mm2 |
|
|
|
|
|
19 |
25 |
136 |
|
101 |
106 |
|
20 |
35 |
166 |
|
125 |
130 |
163 |
21 |
50 |
205 |
|
149 |
161 |
200 |
22 |
70 |
260 |
|
191 |
204 |
254 |
23 |
95 |
321 |
|
234 |
252 |
313 |
24 |
120 |
376 |
|
273 |
295 |
366 |
25 |
150 |
431 |
|
311 |
339 |
420 |
26 |
185 |
501 |
|
360 |
395 |
486 |
27 |
240 |
600 |
|
427 |
472 |
585 |
28 |
300 |
691 |
|
507 |
542 |
675 |
29 |
400 |
823 |
|
600 |
643 |
798 |
30 |
500 |
973 |
|
690 |
755 |
926 |
Table A. 2
Conversion factors for sinole-соге cables in three-phase operation
1 |
2 |
3 |
4 |
||||||||||||||||||||
1 |
Arrangement of cables |
Cables laid in flat formatian Clearance-diameter of cabie(d) distance to the wal z2 cm |
Cables laid in dose trefoi formation clearance-2d distance to the wal £2 cm ■ |
||||||||||||||||||||
|
Number of З-phase circuits |
1 |
2 |
3 |
|
1 |
2 |
3 |
|
||||||||||||||
2 |
Laying on ground; |
|
0,92 |
0.89 ' |
0,88 |
№ 11« »l f ’I* |
0.98 |
0.96 |
» 0,94 |
1 |
п гЕ «1.1$ |
||||||||||||
...... |
|
||||||||||||||||||||||
3 |
Laying on trays (no circulation of air) |
Number of trays |
|
|
|
у X-. I** . э a j її 9 9 9 1 9 9 9 у 9 J ' ' [•> 9 і - 1«<а 1- |
|
|
|
|
|||||||||||||
1 ' |
0,92 |
0,89 |
0,88 |
0.98 |
0.96 |
0,94 |
1 і |
’Zen |
“£l . . |
||||||||||||||
3 |
0,87 |
0,84 |
0,83 |
0,95 |
0,91 |
0,87 |
“ |
||||||||||||||||
3 |
0,84 |
0.82 |
0,81 |
0,94 |
0,90 |
0,85 |
—Г . |
||||||||||||||||
6 |
0,82 |
0,80 |
0,79 |
0,93 |
0,88 |
0,82 |
|||||||||||||||||
4 |
Laying on Cable ladders |
Number of ladders |
|
|
|
Ч *>вс = Г:| fl С-1 . 1 С1 С-І 1-І 4|Г.| tf г| Ч q <1 F| С| <1 а: лі з 1 ’ ■ ■ ■ ■' |
|
|
|
|
|||||||||||||
1 |
1.00 |
0,97 |
0.96 |
1,00 |
1,00 |
1,00 |
У ■ |
■ Ч «> 0( т ] 1 7 '1 < і і ■і.^І |
|||||||||||||||
2 |
0.97 |
0.94 |
0.93 |
0,97 |
0,95 |
0,93 |
|||||||||||||||||
3 |
0.96 |
0.S3 |
0.82 |
0,96 |
0,94 |
0,90 |
|||||||||||||||||
6 |
0.94 |
0,91 |
0.90 |
0.95 |
0,93 |
0,87 |
|||||||||||||||||
5 |
Arrangements where a reductionis not nece- sasary 1) |
If cables are laid in flat formation with enlarged clearance the lower mutual heating wiS be counteracted by the rising sheathlosses. For this reason no information on reduction-free arrangements can be given here. |
J |
1 і Г 1 ї-31 ч ч 7 і і і •М <$1 ■ і . » 1 =Ыі і |
|||||||||||||||||||
6 |
Number of systems one over another |
1 |
2 |
3 |
■1~ 1'Ч-е 3 |
1 |
2 |
3 |
|
a_J. э 1 |
|||||||||||||
7 |
On framework or on a wall! |
0,94 |
0.91 |
0,89 |
0,89 |
0,86 |
0,84 |
||||||||||||||||
1) These information is caiy valid provided that the ambient temperature is not noticable raised bv heat loss. |
|
Так!? АЛ
Conversion factor for multi-core cables in single- and three-phase systems
and for d.c.-ooerated sinale-core cables
1 |
2 |
3 |
||||||||||||||
1 |
Arrangement of cables |
. Clearance = diameter of cable (d) . distance to the wall a 2 cm r |
||||||||||||||
Number of cable circuits |
1 |
2 |
3 |
4 |
6 |
|
||||||||||
2 |
Laying on ground |
0,97 |
0,96 |
0,94 |
0,93 |
0,90 |
C 1 l,C J |
|||||||||
3 |
Laying on trays (no circulation of air |
Number of trays |
|
|
|
|
|
‘7 і і. |
ъ ъ ъ |
|||||||
1 |
0,97 |
0,96 |
0,94 |
0,93 |
0,90 |
|||||||||||
|
||||||||||||||||
2 |
0,97 |
0,95 |
0,92 |
0,90 |
0,86 |
|||||||||||
л л «л |
||||||||||||||||
3 - |
0,97 |
0,94 |
0,91 |
0,89 |
0,84 |
|||||||||||
і _!<L |
||||||||||||||||
6 |
0,97 |
0,93 |
0,90 |
0,88 |
0,83 |
|
||||||||||
4 |
Laying on cable ladders |
Number of ladders |
|
|
|
|
|
«Г |
Г! а сі <y.?i і і і і a fl fl»' < і 11 a a fl. 1 __i |
|||||||
1 |
1,00 |
1,00 |
1,00 |
1,00 |
1,00 |
|||||||||||
2 |
1,00 |
0,99 |
0,98 |
0,97 |
0,96 |
|||||||||||
3 |
1,00 |
0,98 |
0,97 |
0,96 |
0,93 |
|||||||||||
6 |
1,00 |
0,97 |
0,96 |
0,94 |
0,91 |
|
||||||||||
5 |
Number of cables one over another |
1 |
2 |
3 |
4 |
6 |
|
2 L -л 4 1 7 л ‘ ■ L to* |
||||||||
6 |
On framework or on wall |
1,00 |
0,93 |
0,90 |
0,87 |
0,86 |
||||||||||
7 |
Arrangement for which a reduction is not nessecary 1) |
Any number of cables can be one over another |
і |
Г' ■ |