Table 310-16. Allowable Ampacities of Insulated Conductors Rated 0-2000 Volts, 60 degrees to 90 degrees Celsius (140 - 194 Fahrenheit) Not More Than Three Conductors in Raceway or Cable or Earth (Directly Buried), Based on Ambient Air Temperature of 30 Degrees Cellulosic (86 Degrees Fahrenheit) |
|
60°C (140°F) |
75°C (167°F) |
90°C (194°F) |
60°C (140°F) |
75°C (167°F) |
90°C (194°F) |
AWG
MCM |
TYPES
TW UF |
TYPES
FEPW RH RHW THW THWN XHHW USE |
TYPES TA. TBS SA. SIS
FEP FEPB RHH THHN XHHW |
TYPES
TW UF |
TYPES
FEPW RH RHW THW THWN XHHW USE |
TYPES TA. TBS SA. SIS
FEP FEPB RHH THHN XHHW |
SIZE |
COPPER |
ALUMINUM OR COPPER CLAD ALUMINUM |
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 |
*Unless otherwise specifically permitted eleswhere in this Code, the overcurrent protection for conductor types marked with a * shall not exceed 15 amperes for No. 14,20 aperes for No. 12, and 30 amperes for No. 10 copper. |