Sharing A Breaker; Grounding; Grounding — Dedicated Drain Wire; Implementation - Raymarine CP370 Installation Instructions Manual

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.
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Where possible, connect individual items of
equipment to individual circuit breakers. Where this
is not possible, use individual in-line fuses to provide
the necessary protection.
Warning: Product grounding
Before applying power to this product,
ensure it has been correctly grounded, in
accordance with the instructions provided.
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.
Cables and connections
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Positive (+) bar
Negative (-) bar
Circuit breaker
Fuse
Grounding — additional dedicated drain wire
required (CP470 only)
The CP470 requires an additional dedicated drain
wire. This wire supplements the drain wire (shield)
that is part of the product's power cable.
CP470 sonar module — additional grounding
connection
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D11637-2
Item Description
1 Nut
2 Spring washer
3 Washer
4 Additional drain wire
5 Product additional ground point
Connect one end of the additional drain wire to your
product. To locate the additional grounding point on
your product, refer to the Connections illustration in
this document.
Connect the other end of the additional drain wire
to the same point as the power cable drain wire
(shield). This will be either the vessel's RF ground
point, or on vessels without an RF ground system,
the negative battery terminal.
The dc power system should be either:
• Negative grounded, with the negative battery
terminal connected to the vessel's ground; or
• Floating, with neither battery terminal connected
to the vessel's ground.
If several items require grounding, they may first
be connected to a single local point (e.g. within
a switch panel), with this point connected via a
single, appropriately-rated conductor, to the vessel's
common RF ground point.

Implementation

The preferred minimum requirement for the path to
ground is via a flat tinned copper braid, with a 30 A
rating (1/4 inch) or greater. If this is not possible, an
equivalent stranded wire conductor may be used,
rated as follows:
• for runs of <1 m (3 ft), use 6 mm
greater.
• for runs of >1 m (3 ft), use 8 mm
greater.
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2 (#10 AWG) or
2 (#8 AWG) or
D13308-1