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ADCP-80-570 • Issue 2 • March 2006
Page 31
© 2006, ADC Telecommunications, Inc.
APPENDIX A: ALLOWABLE AMPACITIES OF INSULATED CONDUCTORS
This appendix provides guidelines for selecting AWG wire size based on the temperature rating
of the conductor and the anticipated load. The information contained is from Table 310-16 of
the National Electrical Code document, ANSI/NPFA 70 (1978).
Note: Information for aluminum conductors has been omitted from the table here
because copper conductors only are recommended for use with the ADC panel.
Table 310-16 (NEC): Allowable Ampacities of Insulated Conductors, Rated O Through 2000 Volts, 60° to
90°C (140° to 194°F), Not More Than Three Current-Carrying Conductors in Raceway or Cable or Earth
(Directly Buried), Based on Ambient Temperature of 30°C (86°F)
SIZE TEMPERATURE RATING OF CONDUCTOR
AWG
KCMIL
60°C
(114°F)
60°C
(114°F)
60°C
(114°F)
TYPES
TW*,
UF*
TYPES
FEPW*,
RH*, 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
18 .... .... 14
16 .... .... 18
14 20* 20* 25*
12 25* 25* 30*
10 30 35* 40*
8 40 50 55
6 55 65 75
4 70 85 95
3 85 100 110
2 95 115 130
1 110 130 150
1/0 125 150 170
2/0 145 175 195
3/0 165 200 225
4/0 195 230 260
250 215 255 290
300 240 285 320
350 260 310 350
400 280 335 380