Xantrex Freedom XC PRO Series Owner's Manual page 37

Ground Fault Circuit Interrupters (GFCIs)
A GFCI is a device that de-energizes a circuit when a current to
ground exceeds a specified value that is less than that required to
blow the circuit breaker. GFCIs are intended to protect people
from electric shocks and are usually required in wet or damp
locations.
Installations in marine and recreational vehicles require GFCI
protection of branch circuits connected to the AC output of the
Freedom XC PRO.
The Freedom XC PRO GFCI Kit (PN: 808-9817) (sold separately)
option is available to use with the Freedom XC PRO inverter unit.
DC Cabling
This includes all the cables and connectors between the batteries,
the DC disconnect and over-current protection device, and the
Freedom XC PRO. Most mobile installations require multi-strand
insulated cables for flexibility and durability in high vibration
environments and require disconnects and over-current devices.
Electrical wiring sizes in North America are indicated by AWG
notation. In other parts of the world, the metric system is used.
Under the AWG standard, a larger gauge number indicates a
smaller wire diameter. Wire size is usually marked on the larger
sized cables. Table 6 specifies the minimum recommended DC
cable size and maximum fuse size for the Freedom XC PRO. The
DC cables must be copper and must be rated 75 °C
minimum. The cables should be terminated with lugs that fit the
DC stud terminals snugly (
975-0799-01-01
5
" hole size).
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Table 6 Required Cable Sizes
Cable Length:
Battery to
Inverter/charger
Inverter (one
way)
Freedom XC Less than 5 feet
PRO 2000 (1.5 meters)
Freedom XC Less than 5 feet
PRO 3000 (1.5 meters)
NOTE:It is not recommended using a cable longer than 5 feet
(1.5 meters) in each direction. North American cable sizes above
are based on the US National Electrical Code Table 310.17 -
75 °C cables, assuming an ambient temperature of 30 °C cables.
IMPORTANT: Using the correct cable size is critical to achieving
the rated performance of the Freedom XC PRO unit. When
starting a heavy load the Freedom XC PRO can draw current
surges from the battery of up to 400A. If the DC wiring is too small
the voltage drop from this surge will result in a voltage at the
Freedom XC PRO terminals that is too low for the Freedom XC
PRO to operate correctly. The Freedom XC PRO may appear to
operate correctly with smaller cables until a heavy load such as a
microwave or refrigerator attempts to start - then the unit may
work correctly sometimes and not work correctly other times.
Basic Installation Procedures
Minimum Maximum
Cable battery
Size Fuse Size
No. 2/0
250 A DC
AWG
No. 4/0
350 A DC
AWG
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