Grounding The Digital Radar System - Raymarine RA1072HD Installation Manual

1.9 Grounding the digital radar system

It is important that an effective RF ground is connected to the radar
system.
You must ground the radar by connecting the drain/screen wire
(green) of the power cable to the ground point (screen) of the
VCM100, the ship's RF ground system should be connected to the
other screen point on the VCM100 when running the power cables.
Refer to your display unit Owner's Handbook for details.
If you need to extend the drain (screen) wire, the extension wire
should be an 8 mm braid or AWG 10 (6.0 mm
cable.
If your vessel does not have an RF system, connect the drain wire
to the negative battery terminal.
The DC system should be either:
• Negative grounded, with the negative battery terminal connected
to the ship's ground.
• Floating, with neither battery terminal connected to the ship's
ground.
CAUTION:
This radar is not intended for use on 'positive' ground
vessels. The power cable Earth screen connections must be
connected to the ship's ground.
2 ) multi-stranded
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