Raymarine CP450C Installation Instructions Manual page 28

Note:
• Cable length is the distance between the power source and
the unit.
• These wire sizes give a total drop of about 0.5V between the
power source and the unit, achieving a minimum voltage at the
unit of 10.5V with a fully flat battery at 11V.
Sharing a breaker
Where more than 1 piece of equipment shares a breaker you must
provide protection for the individual circuits. E.g. by connecting an
in-line fuse for each power circuit.
+VE bar
Where possible, connect individual items of
equipment to individual circuit breakers.
Where this not possible, use individual in-line
fuses to provide the necessary protection.
Circuit breaker
28
-VE bar
Fuse Fuse
Warning: Product grounding
Before applying power to this product, ensure it has
been correctly grounded, in accordance with the
instructions in this guide.
Grounding — Dedicated drain wire
The power cable supplied with this product includes a dedicated
shield (drain) wire for connection to a vessel's RF ground point.
It is important that an effective RF ground is connected to the
system. A single ground point should be used for all equipment.
The unit can be grounded by connecting the shield (drain) wire of
the power cable to the vessel's RF ground point. On vessels without
an RF ground system the shield (drain) wire should be connected
directly to the negative battery terminal.
The dc power system should be either:
• Negative grounded, with the negative battery terminal connected
to the vessel's ground.
• Floating, with neither battery terminal connected to the vessel's
ground
Warning: Positive ground systems
Do not connect this unit to a system which has positive
grounding.
CP450C