Size of
conductor

mm sq

Diameter

Approx.
cable weight
kg/km

Diameter Under Armour
mm

Diameter Over Armour
mm

Approx Overall Diameter mm

16**
25**
35**

50
70
95

120
150
185

240
300
400

22.9
25.7
28.2

27.1
30.0
33.2

36.2
38.7
41.8

46.5
50.5
55.2

26.1
28.9
31.4

31.1
34.0
37.2

41.2
43.7
46.8

51.5
55.5
60.2

29.7
32.5
35.2

35.1
38.2
41.3

45.8
48.5
51.8

56.7
60.9
66.0

1690
2100
2520

3030
3810
4730

6020
6980
8250

10200
12210
14980

Nom.
area
of
cond.


mm

Direct in ground

In single way ducts

In free air

Single core
Three cables
Trefoil touching

Three core

Single core
Three cables
Ducts
Trefoil touching

Three core

Single core
Three cables
Trefoil touching

Three core

amp

amp

amp

amp

amp

amp

16
25
35

50
70
95

120
150
185

240
300
400

500
630
800
1000

-
-
-

222
271
324

366
409
460

528
589
651

720
789
831
880

114
147
175

207
254
304

345
387
436

502
563
633

-
-
-
-

-
-
-

219
264
310

342
376
414

464
506
535

579
624
650
689

96
124
147

174
214
257

293
328
371

428
480
549

-
-
-
-

-
-
-

230
288
353

411
468
533

630
717
817

924
1041
1131
1227

108
143
170

204
257
315

365
415
476

560
640
734

-
-
-
-