ALLOWABLE AMPACITIES INSULATED CONDUCTORS
(IN A RACEWAY) TABLE 310-16 2005 NEC
|
|
Temperature Rating of Conductor
|
|
|
60°C
|
75°C
|
90°C
|
60°C
|
75°C
|
90°C
|
|
AWG
|
|
THW
|
|
|
THW
|
|
|
|
Types TW, UF
|
THWN
|
|
Types TW, UF
|
THWN
|
|
|
MCM
|
USE
|
THHN
|
USE
|
THHN
|
|
|
COPPER
|
ALUMINUM OR COPPER-CLAD ALUMINUM
|
|
18
|
-----
|
-----
|
14*
|
-----
|
-----
|
-----
|
|
16
|
-----
|
-----
|
18*
|
-----
|
-----
|
-----
|
|
14
|
20*
|
20*
|
25*
|
-----
|
-----
|
-----
|
|
12
|
25*
|
25*
|
30*
|
20*
|
20*
|
25*
|
|
10
|
30*
|
35*
|
40*
|
25*
|
30*
|
35*
|
|
8
|
40
|
50
|
55
|
30
|
40
|
45
|
|
6
|
55
|
65
|
75
|
40
|
50
|
60
|
|
4
|
70
|
85
|
95
|
55
|
65
|
75
|
|
3
|
85
|
100
|
110
|
65
|
75
|
85
|
|
2
|
95
|
115
|
130
|
75
|
90
|
100
|
|
1
|
110
|
130
|
150
|
85
|
100
|
115
|
|
1/0
|
125
|
150
|
170
|
100
|
120
|
135
|
|
2/0
|
145
|
175
|
195
|
115
|
135
|
150
|
|
3/0
|
165
|
200
|
225
|
130
|
155
|
175
|
|
4/0
|
195
|
230
|
260
|
150
|
180
|
205
|
|
250
|
215
|
255
|
290
|
170
|
205
|
230
|
|
300
|
240
|
285
|
320
|
190
|
230
|
255
|
|
350
|
260
|
310
|
350
|
210
|
250
|
280
|
|
400
|
280
|
335
|
380
|
225
|
270
|
305
|
|
500
|
320
|
380
|
430
|
260
|
310
|
350
|
|
600
|
355
|
420
|
475
|
285
|
340
|
385
|
|
700
|
385
|
460
|
520
|
310
|
375
|
420
|
|
750
|
400
|
475
|
535
|
320
|
385
|
435
|
* Unless otherwise specifically permitted in 240.4(E) or 240.4 (G), the overcurrent protection shall not exceed 15 amperes for 14 AWG, 20 amperes for 12 AWG, and
30 amperes for 10 AWG copper; or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper-clad aluminum after any correction factors for ambient temperature
and number of conductors have been applied.