Allowable ampacity of no more than three copper conductors

Tables > Conductors > Ampacity > Copper, <=3

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Ampacities Of Not More Than 3 Insulated Conductors Rated 0-2,000 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 Temperature 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)	200 degrees Celsius (392 degrees Fahrenheit)	250 degrees Celsius (482 degrees Fahrenheit)
AWG kcmil	Types TW, UF	Types FEPW, RH, RHW, THHW, THW, THWN, XHHW, USE, ZW*	Types TBS, SA, SIS, FEP, MI, FEPB, ZW-2, RHH, RHW-2, THHN, THHW, THW-2, XHH, USE-2, THWN-2, XHHW*, XHHW-2	Types Z	Types FEP, FEPB, PFA	Types PFAH, TFE Nickel Or Nickel-Coated Copper
14	20*	20*	25*	34	36	39
12	25*	25*	30*	43	45	54
10	30	35*	40*	55	60	73
8	40	50	55	76	83	93
6	55	65	75	96	110	117
4	70	85	95	120	125	148
3	85	100	110	143	152	166
2	95	115	130	160	171	191
1	110	130	150	186	197	215
1/0	125	150	170	215	229	244
2/0	145	175	195	251	260	273
3/0	165	200	225	288	297	308
4/0	195	230	260	332	346	361
250	215	255	290	-	-	-
300	240	285	320	-	-	-
350	260	310	350	-	-	-
400	280	335	380	-	-	-
500	320	380	430	-	-	-
600	355	420	475	-	-	-
700	385	460	520	-	-	-
750	400	475	535	-	-	-
800	410	490	555	-	-	-
900	435	520	585	-	-	-
1000	455	545	615	-	-	-
1250	495	590	665	-	-	-
1500	520	625	705	-	-	-
1750	545	650	735	-	-	-
2000	560	665	750	-	-	-

Overcurrent protection for conductor types market (*) shall not exceed 15 amperes for No. 14, 20 amperes for No. 12, and 30 amperes for No. 10 copper. 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 70-1999, the National Electrical Code®, Copyright 1998, 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.