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Amp Ratings of Aluminum Conductors
Allowable Ampacities of Insulated Conductors Not More Than Three Conductors in
Raceway, Cable or Earth (Direct Buried) Based on Ambient Temperature
of 30°C (86°F)
Aluminum or Copper-Clad Aluminum
Temperature Rating of Conductor, See NEC Table 310-13
|
60°C (140°F) |
75°C
(167°F) |
90°C
(194°F) |
Size
AWG
KCMIL |
Types
TW*, UF* |
Types
RH*, RHW*, THHW*,
THW*, THWN*,
XHHW*, USE* |
Types
TA, TBS, SA, SIS,
RHH*, RHW-2, THHN*, THHW*, THW-2,
THWN-2, USE-2, XHH, XHHW*, XHHW-2, ZW-2 |
| 18 |
- |
- |
- |
| 16 |
- |
- |
- |
| 14 |
- |
- |
- |
| 12 |
20* |
20* |
25* |
| 10 |
25 |
30* |
35* |
| 8 |
30 |
40 |
45 |
| 6 |
40 |
50 |
60 |
| 4 |
55 |
65 |
75 |
| 3 |
65 |
75 |
85 |
| 2 |
75 |
90 |
100 |
| 1 |
85 |
100 |
115 |
| 1/0 |
100 |
120 |
135 |
| 2/0 |
115 |
135 |
150 |
| 3/0 |
130 |
155 |
175 |
| 4/0 |
150 |
180 |
205 |
| 250 |
170 |
205 |
230 |
| 300 |
190 |
230 |
255 |
| 350 |
210 |
250 |
280 |
| 400 |
225 |
270 |
305 |
| 500 |
260 |
310 |
350 |
| 600 |
285 |
340 |
385 |
| 700 |
310 |
375 |
420 |
| 750 |
320 |
385 |
435 |
| 800 |
330 |
395 |
450 |
| 900 |
355 |
425 |
480 |
| 1000 |
375 |
445 |
500 |
| 1250 |
405 |
485 |
545 |
| 1500 |
435 |
520 |
585 |
| 1750 |
455 |
545 |
615 |
| 2000 |
470 |
560 |
630 |
* Over-current protection shall not exceed 15 amperes for #14 AWG, 20 amperes for #12 AWG and 30 amperes for #10 AWG copper, after any
correction factors for ambient temperature and number of conductors have
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