Applicable To Conductors:
-
Rated 0 Through 2000 Volts
-
60°C Through 90°C (140°F Through 194°F)
-
Not More Than Three Current-Carrying Conductors in
Raceway, Cable, or Earth (Directly Buried)
-
Ambient Temperature of 30°C (86°F)
|
| COPPER |
ALUMINUM |
Conductor
Size
AWG or kcmil |
Allowable
Ampacities* |
Allowable
Ampacities* |
Conductor
Size
AWG or kcmil |
| 60°C |
75°C |
90°C |
60°C |
75°C |
90°C |
| |
|
TYPES THWN, RHW, USE |
TYPES THWN-2, USE-2, XHHW-2, XHHW, RHW-2, RHH |
|
TYPES THWN, RHW, USE |
TYPES THWN-2, USE-2, XHHW-2, XHHW, RHW-2, RHH |
|
| 8 |
40 |
50 |
55 |
30 |
40 |
45 |
8 |
| 6 |
55 |
65 |
75 |
40 |
50 |
60 |
6 |
| 4 |
70 |
85 |
95 |
55 |
65 |
75 |
4 |
| 2 |
95 |
115 |
130 |
75 |
90 |
100 |
2 |
| 1 |
110 |
130 |
150 |
85 |
100 |
115 |
1 |
| 1/0 |
125 |
150 |
170 |
100 |
120 |
135 |
1/0 |
| 2/0 |
145 |
175 |
195 |
115 |
135 |
150 |
2/0 |
| 3/0 |
165 |
200 |
225 |
130 |
155 |
175 |
3/0 |
| 4/0 |
195 |
230 |
260 |
150 |
180 |
205 |
4/0 |
| 250 |
215 |
255 |
290 |
170 |
205 |
230 |
250 |
| 300 |
240 |
285 |
320 |
190 |
230 |
255 |
300 |
| 350 |
260 |
310 |
350 |
210 |
250 |
280 |
350 |
| 400 |
280 |
335 |
380 |
225 |
270 |
305 |
400 |
| 500 |
320 |
380 |
430 |
260 |
310 |
350 |
500 |
| 600 |
355 |
420 |
475 |
285 |
340 |
385 |
600 |
| 700 |
385 |
460 |
520 |
310 |
375 |
420 |
700 |
| 750 |
400 |
475 |
535 |
320 |
385 |
435 |
750 |
| 1000 |
455 |
545 |
615 |
375 |
445 |
500 |
1000 |
|
*Allowable Ampacities: 30ºC (86ºF) Ambient Temperature
Based on 2005 NEC, Table 310.16.
For different ambient temperatures than the one shown above, consult the NEC tables.
Temperature Limitations: The temperature rating associated with the ampacity of a conductor shall be selected and coordinated so as not to exceed the lowest temperature rating of any connected termination, conductor, or device. Conductors with temperature ratings higher than specified for terminations shall be permitted to be used for ampacity adjustment, correction, or both. |
|
source: http://www.allenelectric.com/referencedata/ampacity.htm
Wire Size and Amp Ratings
|
Copper |
Aluminum |
| |
60°C (140°F)
|
75°C (167°F)
|
90°C (194°F)
|
75°C (167°F)
|
90°C (194°F)
|
| Wire Gauge Size |
NM-B, UF-B |
THW, THWN,
SE, USE, XHHW
|
THWN-2, THHN,
XHHW-2, USE-2 |
THW, THWN,
SE, USE, XHHW |
XHHW-2, THHN,
THWN-2 |
|
14 |
15 |
15 |
15 |
--- |
--- |
12 |
20 |
20 |
20 |
15 |
15 |
10 |
30 |
30 |
30 |
25 |
25 |
8 |
40 |
50 |
55 |
40 |
45 |
6 |
55 |
65 |
75 |
50 |
55 |
4 |
70 |
85 |
95 |
65 |
75 |
3 |
85 |
100 |
115 |
75 |
85 |
2 |
95 |
115 |
130 |
90 |
100 |
1 |
--- |
130 |
145 |
100 |
115 |
1/0 |
--- |
150 |
170 |
120 |
135 |
2/0 |
--- |
175 |
195 |
135 |
150 |
3/0 |
--- |
200 |
225 |
155 |
175 |
4/0 |
--- |
230 |
260 |
180 |
205 |
250 |
--- |
255 |
290 |
205 |
230 |
300 |
--- |
285 |
320 |
230 |
260 |
350 |
--- |
310 |
350 |
250 |
280 |
500 |
--- |
380 |
430 |
310 |
350 |
600 |
--- |
420 |
475 |
340 |
385 |
750 |
--- |
475 |
535 |
385 |
435 |
1000 |
--- |
545 |
615 |
445 |
500 |
| |
|
|
|
|
|
WARNING! Installation of electrical wire can be hazardous, if done improperly, can result in personal injury or property damage. For safe wiring practices, consult the National Electrical Code® and your local building inspector.
http://www.cerrowire.com/ampacity-charts
|
