Trace Engineering SW II - REV 4.01 - Table 13, Recommended Minimum AC Wire Sizes (75° C); Table 14, Knockout;Hole Size to Conduit Size Required; Table 15, Safety Ground Wire Sizes

APPENDIX
Page
132
Copyright  Trace Engineering Company, Inc.
5916 - 195th Street N. E.
Arlington, WA 98223
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
SW Series Inverter/Charger
Part No. 2031-5
Rev. B: Sept 1, 1999
Table 13, Recommended Minimum AC Wire Sizes (75 ° C)
INVERTER
MODEL
FULL
PASS-THRU
CAPABILITY
FUSE/BREAKER
REQUIRED
CABLE SIZE
REQUIRED
IN CONDUIT
CABLE SIZE
REQUIRED
IN “FREE AIR”*
105-120 VAC
UNITS
60 amps 60 amps # 6 AWG (THHN) # 8 AWG (THHN)
220-240 VAC
UNITS
30 amps 30 amps # 10 AWG (THHN) # 10 AWG (THHN)
• The term "free air" is defined by the NEC as cabling that is not enclosed in conduit or a raceway.
Cables enclosed in raceways or conduits have substantially lower continuous current carrying ability
due to heating factors.
Table 14, Knockout/Hole Size to Conduit Size Required
KNOCKOUT OR HOLE
DIAMETER
TRADE SIZE OF CONDUIT
INCHES MM INCHES
7/8 (.875) 22.2 ½
1 3/32 (1.093) 27.8 ¾
1 23/64 (1.359) 34.5 1
1 23/32 (1.719) 43.7 1 ¼
1 31/32 (1.968) 50.0 1 ½
2 15/32 (2.468) 62.7 2
3 76.2 2 ½
Table 15, Safety Ground Wire Size Table
The ground wire should be sized per NEC 250-95. The following table is derived from this portion of the
NEC code.
Battery DC Disconnect Size Minimum Size of Copper
Ground Wire
30 Amp or 60 Amp #10 AWG
100 Amp #8 AWG
200 Amp #6 AWG
300+ Amps #2 AWG or greater