TABLE 20

Maximum resistance of conductor and armour for two-core, three core, four-core and five-core cables having wire armour (Type 1 and Type 2*)


Page 5-E-42

HD 604 SI :1994/A1:1997

Part 5 Section E


111 The values given are for plain annealed copper conductors. For tinned conductors reference should be made to HD383

121 With 1 50mm2 neutral

131 With 185mm2 neutral

* The figures for Type 2 cables with copper conductors do not apply for Tl Z insulation (see Table 21)






























Maximum resistance of armour for twin, three and four core cables
having copper conductors and steel wire armour
(Type 2 with Tl Z insulation)

Maximum resistance per km of cable at 20°C

Nominal area of conductor

Steel wire armour for cables with stranded copper conductors

Twin core

Three core

Four core

600/ 1000V

600/ 1000V

600/ 1000V

mm2

ohms

ohms

ohms

2.5

9.1

8.8

7.9

4

7.5

7.0

4.6

6

6.8

4.6

4.1

10

3.9

3.7

3.4

16

3.4

3.1

2.2

TABLE 22

Maximum resistance of conductor and armour for 600/1000 V auxiliary cables with copper conductors
having steel wire armour (Type 1 only)

1

2

3

4

5

6

7

8

Nominal


Maximum resistance per kilometre of cable at

20°C


cross-








sectional




Steel wire armour



area of conductor

Copper conductor •”

Number of cores 121

7

12

19

27

37

48



mm’

Q

Q

Q

Q

Q

Q

0

1.5

12.1

7.5

4.0

3.5

2.3

2.0

1.8

2.5

7.41

6.3

3.5

2.3

1.9

1.7

1.2

4

4.61

4.0

2.3

2.0

1.7

T.2

1.0



The values given are for plain annealed copper conductors. For tinned conductors reference should be made to HD 383.

For non-preferred sizes, the maximum resistance shall not be greater than that of the next lowest preferred number of cores.



Gross cross-sectional areas of armour wires for single core 600/1000 V cables having aluminium wire
armour (Type 1 and Type 2)

1

2

3


Gross cross-sectional area of armour wires

Nominal cross-sectional

Cables with stranded

Cables with solid

area of conductor

copper or aluminium

aluminium conductors


conductors

600/1000V


600/1000V


mm’

mm2

mm2

50

26

24

70

42

38

95

47

42

120

52

46

150

76

68

185

84

76

240

94

84

300

104

92

400

147


500

163

-

630

182

-

800

260

-

1000

284

-

CIRCULAR SECTORAL CONDUCTORS



380


131

480


147

600

-

160

740

-

225

960


250

1200

-

279

Gross cross-sectional areas of armour wires for two, three, four and five-core 600/1000 V cables having
wire armour (Type 1 and Type 2)

1

2

3

4

5

6

7

8

9

Nominal

Gross cross-sectional area of round armour wires

cross-









sectional

Cables with stranded copper conductors*

Cables with solid aluminium

area of


and steel wire armour


conductors and aluminium wire

conductor







armour



Two-

Three-

Four-

Four-

Five-

Two-

Three-

Four-


core

core

core

core

core

core

core

core





(reduced neutral)





mm2

mm2

mm2

mm2

mm2

mm2

mm2

mm2

mm2

1.5,1)

15

16

17

-

19

-

-

-

2.5’11

17

19

20

-

22





19

20

22


25




6t1!

22

23

36


40




IO'1

26

39

42


46



16n

42

45

50

-

72

39

41

46

25

42

62

70

70

88

38

58

66

35

60

68

78

76

100

54

64

72

50

68

78

90

86

144

60

72

82

70

80

90

131

128

166

70

84

122

95

113

128

147

144


100

119

135

120

125

141

206

163

-

-

131

191

150

138

201

230

220


-

181

211

185

191

220

255

250



206

235

240

215

250

289

279



230

265

300

235

269

319

304

-

-

250

289

400

265

304

452

343

-

-



tn

Circular conductors

These figures do not apply to those cables having Tl Z insulation (ref. Tables 6B, 8B and 10B)TABLE 25

Gross cross-sectional areas of armour wires for 600/1000V auxiliary cables with copper conductors having
steel wire armour (Type 1 only)

1

2

3

4

5

6

7

Nominal cross-

Gross cross-sectional areas of armour wires

sectional area of conductor

Number of cores


7

12

19

27

37

48

mm2

mm2

mm2

mm2

mm2

mm2

mm2

1.5

20

39

45

70

78

90

2.5

24

45

70

84

94

138

4

39

68

80

96

138

157