Triplexed Conductors - In Air

3 conductor cable in air

Three single or triplexed conductors — in air

Closed shield operation. Shields bonded and grounded at multiple points.Any load factor from 30 to 100%. Also applies to single conductors in a group and in contact with each other.

The ampacities are for a single, loaded cable in still air. In a group of loaded cables in close proximity in air, exposed or enclosed, follow the correction method shown on the ampacity correction factors page. For ambient temperatures other than indicated, also use correction factors shown on the ampacity correction factors page.

Air ambient temperature 40°C.

 

Three cables per support or messenger

Copper

Conductor
Size
AWG-kcmil

Non-Shielded

Shielded

600-5000
Volts Ampacity

2001-5000
Volts Ampacity

5001-35,000
Volts Ampacity

90° C
(194°F)

90° C
(194°F)

105°C
(221°F)

90° C
(194°F)

105°C
(221°F)

8.........
.
6
.........
4
.........
2
.........
1
.........
1/0
.........
2/0
.........
3/0
.........
4/0
.........
250
.........
350
.........
500
.........
750
.........
1000
........\

66.........
89
.........
117
.........
158
.........
185
.........
214
.........
247
.........
287
.........
335
.........
374
.........
464
.........
580
.........
747
.........
879
.........

65...
90
...
120
...
160
...
185
...
215
...
250
...
290
...
335
...
375
...
465
...
580
...
750
...
880
...

74...
99
...
130
...
175
...
205
...
240
...
275
...
320
...
375
...
415
...
515
...
645
...
835
...
980
...

...
100
...
130
...
170
...
195
...
225
...
260
...
300
...
345
...
380
...
470
...
580
...
730
...
850
...

...
110
...
140
...
195
...
225
...
255
...
295
...
340
...
390
...
430
...
525
...
650
...
820
...
950
...

Aluminum

Conductor
Size
AWG-kcmil

Non-Shielded

Shielded

600-5000
Volts Ampacity

2001-5000
Volts Ampacity

5001-35,000
Volts Ampacity

90° C
(194°F)

90° C
(194°F)

105°C
(221°F)

90° C
(194°F)

105°C
(221°F)

8.........
.
6
.........
4
.........
2
.........
1
.........
1/0
.........
2/0
.........
3/0
.........
4/0
.........
250
.........
350
.........
500
.........
750
.........
1000
........\

51.........
69
.........
91
.........
123
.........
144
.........
167
.........
193
.........
224
.........
262
.........
292
.........
364
.........
458
.........
598
.........
716
.........

50...
70
...
90
...
125
...
145
...
170
...
195
...
225
...
265
...
295
...
365
...
460
...
600
...
715
...

57...
77
...
100
...
135
...
160
...
185
...
215
...
250
...
290
...
325
...
405
...
510
...
665
...
800
...

...
75
...
100
...
130
...
150
...
175
...
200
...
230
...
270
...
300
...
370
...
460
...
590
...
700
...

...
84
...
110
...
150
...
175
...
200
...
230
...
265
...
305
...
335
...
415
...
515
...
660
...
780
...