Allowable ampacity of single, insulated copper conductors

Tables > Conductors > Ampacity > Copper, single

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Ampacities Of Single Insulated Conductors Rated 0-2,000 Volts In Free Air
Based On Ambient temperature Of 30^o C (86^o F)				Based On Ambient temperature Of 40^o C (104^o F)
Size	60^o C (140^o F)	75^o C (167^o F)	90^o C (194^o F)	150^o C (302^o F)	200^o C (392^o F)	250^o C (482^o F)	Bare Or Covered Conductors
AWG kcmil	Types TW, UF	Types FEPW, RH, RHW, THHW, THW, THWN, XHHW, 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	Bare Or Covered Conductors
14	25*	30*	35*	46	54	59	30
12	30*	35*	40*	60	68	78	35
10	40*	50*	55*	80	90	107	50
8	60	70	80	106	124	142	70
6	80	95	105	155	165	205	95
4	105	125	140	190	220	278	125
3	120	145	165	214	252	327	150
2	140	170	190	255	293	381	175
1	165	195	220	293	344	440	200
1/0	195	230	260	339	399	532	235
2/0	225	265	300	390	467	591	275
3/0	260	310	350	451	546	708	320
4/0	300	360	405	529	629	830	370
250	340	405	455	-	-	-	415
300	375	445	505	-	-	-	460
350	420	505	570	-	-	-	520
400	455	545	615	-	-	-	560
500	515	620	700	-	-	-	635
600	575	690	780	-	-	-	710
700	630	755	855	-	-	-	780
750	655	785	885	-	-	-	805
800	680	815	920	-	-	-	835
900	730	870	985	-	-	-	865
1000	780	935	1055	-	-	-	895
1250	890	1065	1200	-	-	-	-
1500	980	1175	1325	-	-	-	1205
1750	1070	1280	1445	-	-	-	-
2000	1155	1385	1560	-	-	-	1420

Overcurrent protection for conductor types marked (*) shall not exceed 15 amperes for No. 14, 20 amperes for No. 12, and 30 amperes for No. 10 copper. See NEC 240-3 for motor & welders overcurrent protection exceptions.
For ambient temperatures other than those noted above, see NEC tables 310-17 & 310-19.