Table 1, Recommended Dc Wire/Overcurrent Device; Table 2, Dc Wire Size For Increased Distance - Magnum Energy MM Series Owner's Manual

2.0 Installation
Info: The DC wires must be color coded with colored tape
or heat shrink tubing; RED for positive (+), BLACK for
negative (-), and GREEN for DC ground.
The DC wires must have soldered and crimped lugs, crimped copper
compression lugs, or aluminum mechanical lugs. Soldered connections
alone are not acceptable for this application.

Table 1, Recommended DC Wire/Overcurrent Device

Full Load DC
Input Current
Maximum DC
Input Current
Minimum
Wire Size
Maximum DC
Overcurrent Device*
DC Ground
Wire Size
*Based on NEC, NFPA 70, Table 310-17, for 75° C single-insulated
If the inverter is expected to operate at a distance greater than three
feet from the battery bank, the DC wire will need to be increased to
overcome the increase in resistance – which affects the performance
of the inverter. Continue to use the overcurrent device and DC ground
wire previously determined from Table 1 and then, refer to Table 2 to
determine the minimum DC wire size you need for various distances
based on your inverter model.

Table 2, DC Wire Size For Increased Distance

MM612
MM1212
12
60 amps
125 amps
# 4 AWG
125 amps
# 6 AWG
cables in free air
Minimum recommended DC wire size (one way)
3 ft or less 3 to 5 ft
#4 AWG #2 AWG
# 1 AWG #1/0 AWG
Inverter Model
MM612 MM1212
125 amps
175 amps
# 1 AWG
200 amps
# 6 AWG
5 to 10 ft
#1/0 AWG
#2/0 AWG
© 2010 Magnum Energy, Inc.
10 to 15 ft
#2/0 AWG
not
recommended