Instructions / Assembly
PAGE 40
InstallatIon and applIcatIon GuIde For 600v conductors
Table 310-16 Allowable Ampacities of Insulated 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),
Based on Ambient Temperature of 30°C (86°F)
T E M P E R A T U R E R A T I N G O F C O N D U C T O R
(SEE TABLE 310.13)
SIZE AWG OR
KCMIL
60°C (140°F) 75°C (167°F) 90°C (194°F) 60°C (140°F) 75°C (167°F) 90°C (194°F)
SIZE AWG OR
KCMIL
TYPES TW, UF
TYPES RHW,
THHW, THW,
THWN, XHHW,
USE, ZW
TYPES TBS,
SA, SIS, FEP,
FEPB, MI, RHH,
RHW-2, THHN,
THHW, THW-2,
THWN-2, USE-
2, XHH, XHHW,
XHHW-2, ZW-2
TYPES TW, UF
TYPES RHW,
THHW, THW,
THWN, XHHW,
USE
TYPES TBS,
SA, SIS, THHN,
THHW, THW-
2, THWN-2,
RHH, RHW-2,
USE-2, XHH,
XHHW, XHHW-
2, ZW-2
COPPER ALUMINUM OR COPPER-CLAD ALUMINUM
6
600
700
900
-
-
70
-
-
-
-
-
-
-
-
90
-
-
-
60
-
-
-
6
600
700
900
CORRECTION FACTORS
AMBIENT
TEMPS. (°C)
FOR AMBIENT TEMPERATURES OTHER THAN 30°C (86°F) MULTIPLY THE ALLOWABLE AMPACITIES
SHOWN ABOVE BY THE APPROPRIATE FACTOR SHOWN BELOW.
AMBIENT
TEMP. (°F)
-
-
-
0.67
-
0.96
0.76
-
-
-
0.67
-
0.96
0.76
70-77
Reprinted with permission from NFPA 70-2008, the National Electrical Code
®
Copyright© 2007, National Fire Protection Association, Quincy, MA 02169. This reprinted material is
not the official position of the NFPA on the referenced subject which is represented solely by the standard in its entirety.