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MODEL AMPACITY DC BREAKER DC FUSE
FX2012(M)T 260 amps OBDC-250 Class T-400 (Mobile Only)
FX2024(M)T 175 amps OBDC-175 Class T-300 (Mobile Only)
FX2532(M)T 175 amps OBDC-175 Class T-300 (Mobile Only)
FX2548T 100 amps OBDC-100 Not Recommended
VFX2812(M) 260 amps OBDC-250 Class T-400 (Mobile Only)
VFX3524(M) 260 amps OBDC-250 Class T-400 (Mobile Only)
VFX3232(M) 175 amps OBDC-175 Class T-300 (Mobile Only)
VFX3648 175 amps OBDC-175 Not Recommended
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WIRE SIZES
The following chart contains information on wire sizes, the DC resistance of the wires and the
corresponding diameters and areas of these wires. This information can be used to calculate the
voltage drop of the wires or to nd an equivalent wire size.
SIZE DC CROSS-SECTIONAL AREA APPROXIMATE DIAMETER
(AWG)
Resistance in Ohms
(1000 feet)
INCHES MILLIMETERS INCHES MILLIMETERS
14 3.14 .0032 2.08 .078 1.98
12 1.98 .0051 3.31 .101 2.57
10 1.24 .0082 5.26 .126 3.20
8 0.78 .0130 8.37 .162 4.11
6 0.50 .0206 13.30 .215 5.46
4 0.31 .0328 21.15 .269 6.83
2 0.19 .0521 33.62 .337 8.56
1 0.15 .0657 42.41 .376 9.55
1/0 0.12 .0829 53.50 .423 10.74
2/0 0.10 .1045 67.43 .508 12.90
3/0 0.08 .1318 85.01 .576 14.63
4/0 0.06 .1662 107.20 .645 16.38
MAXIMUM OVERCURRENT PROTECTION AMPACITY
This rating species the proper overcurrent protection ampacity.
• OBDC breakers are panel-mount circuit breakers.
• Class T DC fuses are terminal-mounted and should always be used in conjuncture with a disconnect mechanism.
• FXs used in home installations should use properly sized DC circuit breakers.
• A DC breaker includes both overcurrent protection and disconnect capability.
• OutBack Power Systems recommends Class T fuses for marine installations where a DC disconnect is not required.