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

    1. 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.

    1. Current-carrying capacity

      1. 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.

    1. 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.

    1. 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.

    1. 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' ■