Basic Installation Procedures
975-0822-01-01 33
DC Earthing
To connect the DC earth:
1. The equipment earthing lug (DC earth lug) on the DC end of
the Freedom X is used to connect the chassis of the
Freedom X to your system’s DC negative connection or
earthing 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 earth lug for your AC earthing.
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 earthing details.
4. See Figure 1 for the location of the DC earth lug. Make sure
to tighten the bolt on the DC earth lug to a torque of 2.6N-m
of force. Apply an anti-corrosion compound to the copper
wire prior to connecting to the DC earth lug.
Recreational Vehicle
Use minimum-sized, stranded copper wire and connect it between
the Chassis Earth lug and the vehicle’s DC earthing point (usually
the vehicle chassis or a dedicated DC earth bus). See regulatory
references below.
Marine
Use stranded, copper wire that is bare or has insulation rated
minimum 105°C, and connect it between the Chassis Earth lug
and the boat’s DC earthing bus or engine negative bus. Use a wire
of gauge 53.5mm
2
minimum. See regulatory references below.
Regulatory
references
For DC voltage systems under 50VZ in an RV installation, an 8.36mm
2
copper bonding conductor would be acceptable for the inverter enclosure earth
bonding only. The "house" battery system must, however, be earth bonded. And
for DC voltage systems under 50VZ in a marine installation, a DC Earthing
conductor shall not be smaller than one size under that required for current
carrying conductors supplying the device .
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