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APPENDIX
2001 Xantrex Technology, 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. C: February 2001
Page
131
Note: Sizes shown are for the conductor – do not include any insulation when determining your wire
size.
Figure 40, AWG Wire Size
Table 11, Minimum Recommended Battery Cable Size vs. Cable Length
INVERTER
MODEL
TYPICAL
DC
AMPS
1
NEC
AMPS
2
1 TO 3 FEET
ONE WAY
3 TO 5 FT
ONE WAY
5 TO 10 FT
ONE WAY
SW2512 267 Amps 334 Amps #4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
Not Recommended
SW2612E 278 Amps 348 Amps #4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
Not Recommended
SW3024E or J 160 Amps 201 Amps #4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
SW4024 or W, K 214 Amps 267 Amps #4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
SW3048E or J 80 Amps 100 Amps #2/0 AWG/67.4 mm
2
#2/0 AWG/67.4 mm
2
#4/0 AWG/107 mm
2
SW4048 or K 107 Amps 134 Amps #2/0 AWG/67.4 mm
2
#2/0 AWG/67.4 mm
2
#4/0 AWG/107 mm
2
SW4548E or A 120 Amps 150 Amps #2/0 AWG/67.4 mm
2
#2/0 AWG/67.4 mm
2
#4/0 AWG/107 mm
2
SW5548 147 Amps 184 Amps #4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
#4/0 AWG/107 mm
2
1
TYPICAL DC AMPS is based on Low Battery Voltage with an efficiency of 85%.
2
NEC AMPS is based on Low Battery Voltage, an efficiency of 85%, and a 125% NEC de-rating.
Table 12, Battery Cable to Maximum Breaker/Fuse Size
CABLE SIZE
REQUIRED
RATING IN
CONDUIT
MAXIMUM
BREAKER SIZE
RATING IN
“FREE AIR”
MAXIMUM
FUSE SIZE
#2 AWG 115 amps 125 amps* 170 amps 175 amps*
#2/0 (00) AWG 175 amps 175 amps 265 amps 300 amps*
#4/0 (0000) AWG 230 amps 250 amps* 360 amps 400 amps*
* The NEC allows rounding up to the next standard fuse size from the cable rating, i.e. 150-amp cable size
rounds up to a standard 175-amp size.
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.
3/0
.475
4/0
.530
250 MCM
.580
300 MCM
.635
350 MCM
.690
400 MCM
.730
500 MCM
.820
1
.335
1/0
.380
2/0
.420
12
.072
10
.115
8
.146
6
.184
4
.235
3
.281
2
.295
14
.073
SIZE
DIAMETE
R
SIZE
DIAMETE
R