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
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 |