Tables > Conductors > Ampacity > Aluminum or Copper-clad, <= 3
Allowable ampacity of no more than three aluminum or copper-clad aluminum conductors

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
1220*20*25*30
102530*35*44
830404557
640506075
455657594
3657585109
27590100124
185100115145
1/0100120135169
2/0115135150198
3/0130155175227
4/0150180205260
250170205230-
300190230255-
350210250280-
400225270305-
500260310350-
600285340385-
700310375420-
750320385435-
800330395450-
900355425480-
1000375445500-
1250405485545-
1500435520585-
1750455545615-
2000470560630-

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 Code, 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.
 
 
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