3 Conductor - In Conduit

3 conductor cable - conduit in air

Three conductor cable
— conduit in air

Any load factor from 30 to 100%.

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.

Air ambient temperature 40°C.

 

One isolated conduit — three conductors in air

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
........\

52.........
69
.........
91
.........
123
.........
141
.........
166
.........
190
.........
218
.........
255
.........
282
.........
348
.........
425
.........
524
.........
590
.........

52...
69
...
91
...
125
...
140
...
165
...
190
...
220
...
255
...
280
...
350
...
425
...
525
...
590
...

58...
77
...
100
...
135
...
155
...
185
...
210
...
245
...
285
...
315
...
390
...
475
...
585
...
660
...

...
83
...
105
...
145
...
165
...
195
...
220
...
250
...
290
...
315
...
385
...
470
...
570
...
650
...

...
92
...
120
...
165
...
185
...
215
...
245
...
280
...
320
...
350
...
430
...
525
...
635
...
725
...

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
........\

41.........
53
.........
71
.........
96
.........
110
.........
130
.........
149
.........
170
.........
200
.........
221
.........
274
.........
341
.........
432
.........
504
.........

41...
53
...
71
...
96
...
110
...
130
...
150
...
170
...
200
...
220
...
275
...
340
...
430
...
505
...

46...
59
...
79
...
105
...
125
...
145
...
165
...
190
...
225
...
245
...
305
...
380
...
480
...
560
...

...
64
...
84
...
115
...
130
...
150
...
170
...
195
...
225
...
250
...
305
...
380
...
470
...
550
...

...
71
...
94
...
125
...
145
...
170
...
190
...
220
...
255
...
280
...
340
...
425
...
520
...
615
...