Tables > Conductors > Ampacity > Aluminum or Copper-clad, single
Allowable ampacity of single, insulated aluminum or copper-clad aluminum conductors

Ampacities Of Single Insulated Conductors Rated 0-2,000 Volts In Free Air
Based On Ambient Temperature Of 30 degrees Celsius (86 degrees Fahrenheit) 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)
AWG
kcmil
Types
TW*,
UF*
Types
THWN*,
THHW*
XHHW*,
RHW*,
THW*,
RH*
Types
TBS, XHH,
RHH*,RHW-2,
XHHW*, USE-2,
THHN*, SA,
THHW*, THW-2,
XHHW-2, ZW-2,
THWN-2, SIS
Types
Z
14----
1225*30*35*47
1035*40*40*63
845556083
6607580112
480100110148
395115130170
2110135150198
1130155175228
1/0150180205263
2/0175210235305
3/0200240275351
4/0235280315411
250265315355-
300290350395-
350330395445-
400355425480-
500405485545-
600455540615-
700500595675-
750515620700-
800535645725-
900580700785-
1000625750845-
1250710855960-
15007959501075-
175087510501185-
200096011501335-

Overcurrent protection for conductor types marked (*) shall not exceed 15 amperes for Size 12 AWG, and 25 amperes for Size 10 AWG. See NEC 240-3 for motor & welders overcurrent protection exceptions.
For ambient temperatures other than those noted above, see NEC tables 310-17 & 310-19.

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.
 
 
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