Allowable ampacity of no more than three aluminum or copper-clad aluminum conductors

Tables > Conductors > Ampacity > Aluminum or Copper-clad, <= 3

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Ampacities of not more than 3 single insulated conductors rated 0-2000 volts in raceway or cable
In Raceway, Cable Or Earth Based On Ambient Temperature Of 30 degrees Celsius (86 degrees Fahrenheit)				In Raceway Or Cable Based On ambient Temp Of 40 degrees Celsius (104 degrees Fahrenheit)
Size	60 degrees Celsius (140 degrees Fahrenheit)	75 degrees Celsius (167 degrees Fahrenheit)	90 degrees Celsius (194 degrees Fahrenheit)	150 degrees Celsius (302 degrees Fahrenheit)
AWG kcmil	Types TW* UF*	Types THWN* THHW* XHHW* USE* THW* RH, RHW	Types TBS, SA, SIS, THHN* THHW, THW-2, RHH, RHW-2, USE-2, XHH, XHHW, XHHW-2, ZW-2	Types Z
12	20*	20*	25*	30
10	25	30*	35*	44
8	30	40	45	57
6	40	50	60	75
4	55	65	75	94
3	65	75	85	109
2	75	90	100	124
1	85	100	115	145
1/0	100	120	135	169
2/0	115	135	150	198
3/0	130	155	175	227
4/0	150	180	205	260
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	-

Overcurrent protection for conductor types marked (*) shall not exceed 15 amperes for Size 12 AWG, and 25 amperes for Size 10 AWG. See NEC 240-2 for motor & welders overcurrent protection exceptions. See NEC 240-3D.
For ambient temperatures other than those noted above, see NEC tables 310-16 & 310-18 Footnotes.
Reprinted with permission from NFPA 70-2005, the National Electrical CodeŽ, Copyright 2005, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the referenced subject which is represented only by the Standard in its entirety.