Ampacity of Copper & Aluminum Wire

COPPER				ALUMINUM
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)
Conductor Size AWG or kcmil	Allowable Ampacities*			Allowable Ampacities*			Conductor Size AWG or kcmil
Conductor Size AWG or kcmil	60°C	75°C	90°C	60°C	75°C	90°C	Conductor Size AWG or kcmil
		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.