Nominal
Area
of
Conductor |
Unarmoured cables |
Hard drawn aluminium wire armoured cable |
Max dc.
Resistance
at 20°c |
Approx.
Capacit
Ance |
Conductor
Short circuit
Rating
for
one
second |
Standard
Packing
length
with +-5%
Tolerance |
Approx
Overall
Diameter |
Current rating |
Approx
Over
all
Diameter |
Current rating |
Direct
In
ground |
In
Air |
Direct
In ground |
In air |
Solid
Bonded |
Single
Point
Bonded |
Solid
Bonded |
Single
Point
Bonded |
Sqmm. |
mm |
Amp |
Amp |
mm |
Amp |
Amp |
Amp |
Amp |
Ohm/km |
Mfd/km |
Ka |
Mtrs. |
50
70 |
36.5
38.0 |
145
177 |
187
233 |
40.0
41.5 |
145
177 |
145
177 |
190
238 |
190
242 |
0.641
0.443 |
0.13
0.14 |
4.70
6.58 |
500
500 |
95
120 |
40.0
41.5 |
211
240 |
283
326 |
43.5
45.0 |
211
240 |
215
240 |
292
331 |
292
335 |
0.320
0.253 |
0.16
0.17 |
8.93
11.28 |
500
500 |
150
185
240 |
43.0
45.0
47.5 |
269
303
351 |
372
424
510 |
46.5
48.0
51.0 |
265
300
335 |
269
303
351 |
377
424
510 |
387
434
525 |
0.206
0.164
0.125 |
0.18
0.21
0.22 |
14.10
17.39
22.56 |
500
500
500 |
300 |
50.0 |
397 |
578 |
54.5 |
377 |
397 |
573 |
588 |
0.100 |
0.24 |
28.20 |
500 |
400 |
53.0 |
55 |
678 |
57.5 |
430 |
455 |
658 |
688 |
0.0778 |
0.26 |
37.60 |
500 |
500
630 |
56.5
60.0 |
517
590 |
784
914 |
61.0
64.5 |
477
530 |
513
585 |
748
853 |
794
919 |
0.0605
0.0469 |
0.28
0.32 |
47.00
59.22 |
500
500 |
800
1000 |
67.0
73.0 |
670
744 |
1075
1220 |
71.5
78.5 |
575
615 |
650
710 |
964
1068 |
1065
1200 |
0.0367
0.0291 |
0.37
0.41 |
75.0
94.00 |
500
500 |