Xantrex Freedom XC PRO Series Owner's Manual page 53

DC Grounding
To connect the DC ground:
1. The equipment grounding lug (DC ground lug) on the DC end
of the Freedom XC PRO is used to connect the chassis of
the Freedom XC PRO to your system's DC negative
connection or grounding bus point as required by electrical
regulations.
2. Use copper wire that is either bare or provided with green
insulation. Do not use the DC ground lug for your AC
grounding. See the AC wiring instructions in this section.
3. Follow the guidelines below that correspond to the specific
type of installation. These guidelines assume you are using
the DC supply cable and fuse sizes recommended in this
guide. If you are using different sizes, refer to the applicable
installation code for DC grounding details.
4. See Figure 7 for the location of the DC ground lug. Make
sure to tighten the bolt on the DC ground lug to a torque of
23 in-lb (2.6 N-m) of force. Apply an anti-corrosion
compound to the copper wire prior to connecting to the DC
ground lug.
Recreational Vehicle
Use 8AWG minimum-sized, stranded copper wire and connect it
between the Chassis Ground lug and the vehicle's DC grounding
point (usually the vehicle chassis or a dedicated DC ground bus).
See regulatory references below.
975-0799-01-01
Marine
Use copper wire that is bare or has insulation rated minimum
105 °C, and connect it between the Chassis Ground lug and the
boat's DC grounding bus or engine negative bus. Use a wire of
gauge 2/0AWG minimum. See regulatory references below.
For DC voltage systems under 50 VDC in an RV installation, an 8AWG copper
Regulatory
bonding conductor would be acceptable for the inverter/charger enclosure ground
references
bonding only per UL458 §63.6; §30.10 standard [≤ 150 mV @ 30A connection, per
§63.9; §63.10] and per ANSI/RVIA LV code §2-5.1 Bonding Voltage Converter
Enclosures. The "house" battery system must, however, be ground bonded per
ANSI/RVIA LV code §2-4 Auxiliary Battery Grounding; and
For DC voltage systems under 50 VDC in a marine installation, [UL458 §SA7.2]
a DC Grounding conductor shall not be smaller than one size under that required
for current carrying conductors supplying the device per ABYC E-11 §11.16.2 but
not less than 8AWG [USGC 46 CFR §111.05-31].
Basic Installation Procedures
37