Installation Instructions Part 1

G-Series Installation & Commissioning 34
Power distribution notes:
• Raymarine recommend that you have a dedicated distribution
panel for your G-Series system.
• All GPM400 processor units must be powered from a single
breaker or switch, with appropriate circuit protection.
• All monitors and ancillary equipment should where possible be
wired to individual breakers.
Sharing a breaker
Where more than 1 piece of equipment shares a breaker you must
provide protection for the individual circuits. E.g. an in-line fuse for
each power circuit
The fuse must be of an appropriate type and rating for the load to
be protected.
Circuit grounding
Grounding notes
• Use a dedicated earthing plate (e.g. dynaplate) in contact with
the water.
• Ground cables may be routed to a common point (e.g. within
the switch panel. With a single (appropriately rated) copper
braid connecting to the earthing plate.
• Use flat tinned copper braid, 30 A rating (1/4 inch) or greater.
Equivalent stranded wire diameter 4mm or greater.
• Keep the length of the earth braid as short as possible.
• Installations using both AC and DC current should have a sepa-
rate ground circuit for each. See
Circuit isolation on page 32.
D10164-1
+VE bar
Circuit breaker
FuseFuse
Monitors and ancilliary equipment where
possible be wired to individual breakers.
Where this not possible an inline FUSE
can be used to provide additional portection.
-VE bar
Grounding
The power cable screen and all Ground terminals
MUST be connected to ship’s ground . Failure to
connect to ship’s ground may cause it, or other
on-board electronics to function incorrectly .
No positive ground
The G-Series system is NOT intended for use on
“positive” ground boats. The power input cable
earth screen connections must be connected
directly to the boats ground.
No ground loops
Ground loops may cause galvanic corrosion.
Avoid using the ships structure (metal) as an
earth point, as this could result in ground loops.