Nominal
cross
sectional
area |
Nominal
Thickness
of
Insulation
|
Minimum
thickness
of
Inner
sheath
|
Arrrour |
Nominal
thickness
of
Outer
sheath |
Approx
overall
diameter
|
Max. DC
conductor
resistance
at
20° C
|
CURRENT
RATINGS |
Galv.
Round
Steel Wire
Nominal
diameter
|
Galv.
Flat
Steel Strip
Nominal
thickness |
Direct in
Ground
|
In Duct
|
In Air
|
| Sq. mm |
mm |
mm. |
mm. |
mm |
mm. |
mm. |
Ohm/km |
Amps. |
Amps. |
Amps. |
1.5 |
0.8 |
0.3 |
1.4 |
- |
1.8 |
14.1 |
18.1 |
16 |
14 |
13 |
2.5* |
0.9 |
0.3 |
1.4 |
- |
1.8 |
15.4 |
12. 1 |
21 |
18 |
18 |
4* |
1.0 |
0.3 |
1.4 |
- |
1.8 |
16.9 |
7.41 |
28 |
23 |
23 |
6* |
1.0 |
0.3 |
1.4 |
- |
1.8 |
18.0 |
4.61 |
35 |
30 |
30 |
10* |
1.0 |
0.3 |
- |
0.8 |
2.0 |
19.4 |
3.08 |
46 |
39 |
40 |
16 |
1.0 |
0.3 |
- |
0.8 |
2.0 |
20.1 |
1.91 |
60 |
50 |
51 |
25 |
1.2 |
0.3 |
- |
0.8 |
2.0 |
23.1 |
1.20 |
76 |
63 |
70 |
35 |
1.2 |
0.3 |
- |
0.8 |
2.0 |
25.0 |
0.868 |
92 |
77 |
86 |
50 |
1.4 |
0.3 |
- |
0.8 |
2.0 |
28.0 |
0.641 |
110 |
95 |
105 |
70 |
1.4 |
0.3 |
- |
0.8 |
2.2 |
31.6 |
0.443 |
135 |
115 |
130 |
95 |
1.6 |
0.4 |
- |
0.8 |
2.2 |
35.4 |
0.320 |
165 |
140 |
155 |
120 |
1.6 |
0.4 |
- |
0.8 |
2.2 |
38.5 |
0.253 |
185 |
155 |
180 |
150 |
1.8 |
0.4 |
- |
0.8 |
2.4 |
42.3 |
0.206 |
210 |
175 |
205 |
185 |
2.0 |
0.5 |
- |
0.8 |
2.6 |
47.2 |
0.164 |
235 |
200 |
240 |
240 |
2.2 |
0.5 |
|
0.8 |
2.8 |
52.9 |
0.125 |
275 |
235 |
280 |
300 |
2.4 |
0.6 |
- |
0.8 |
3.0 |
58.2 |
0.100 |
305 |
260 |
315 |
400 |
2.6 |
0.6 |
- |
0.8 |
3.2 |
64.6 |
0.0778 |
335 |
290 |
375 |
500 |
3.0 |
0.7 |
- |
0.8 |
3.6 |
72 4 |
0.0605 |
350 |
310 |
410 |
630 |
3.4 |
0.7 |
- |
0.8 |
3.8 |
81.2 |
0.0469 |
365 |
325 |
455 |