Raymarine AIS 350 Installation Instructions Manual page 36

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.
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Positive (+) bar
Negative (-) bar
Circuit breaker
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
The following requirements apply when grounding Raymarine
equipment which does not have a dedicated drain wire or shield:
Common ground point
The negative wire must be connected to a bonded common ground
point, i. e. with the ground point connected to battery negative, and
situated as close as possible to the battery negative terminal.
D11637-2
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1. Power cable to display
2. Bonded common ground connection
3. Battery
Implementation
If several items require grounding, they may be 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 boat's
common ground.
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AIS350 / AIS650