Raymarine AIS350 Installation Instructions Manual page 47

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.
1
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.
AIS650 Class B transceiver
2
3
The preferred minimum requirement for the path to ground (bonded
or non-bonded) 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
• for runs of >1 m (3 ft), use 8 mm
In any grounding system, always keep the length of connecting
braid or wires as short as possible.
Important: Do NOT connect this product to a positively-grounded
power system.
References
• ISO 10133/13297
• BMEA code of practice
• NMEA 0400
Connecting power
The use of crimped and soldered lugs is recommended, to provide
optimum connection to the power source.
Connect your AIS unit's power cable to either a 12 V dc or 24 V dc
power source as follows:
1. Connect the red wire to the 5 A fuse or equivalent automatic
circuit breaker to the supply positive terminal.
2. Connect the black wire to the supply negative terminal.
2 (#10 AWG) (6 mm) or greater.
2 (#8 AWG) or greater.
47