Raymarine RAY53 Installation & Operation Instructions page 35

dedicated Power cable extensions
the product's documentation.
A Battery connection scenario A: suitable for a
vessel with a common RF ground point. In
this scenario, if your product's power cable is
supplied with a separate drain wire then it should
be connected to the vessel's common ground
point.
B Battery connection scenario B: suitable for
a vessel without a common grounding point.
In this case, if your product's power cable is
supplied with a separate drain wire then it should
be connected directly to the battery's negative
terminal.
Implementation — connection to distribution panel
• Alternatively, the supplied power cable may be
connected to a suitable breaker or switch on the
vessel's distribution panel or factory-fitted power
distribution point.
Cables and connections
81381-1-Ray53_63_73_Install_and_Ops_PRINT.pdf 35
advice provided in • The distribution point should be fed from the vessel's
primary power source by 8 AWG (8.36 mm
• Ideally, all equipment should be wired to individual
suitably-rated thermal breakers or fuses, with
appropriate circuit protection. Where this is not
possible and more than 1 item of equipment shares a
breaker, use individual in-line fuses for each power
circuit to provide the necessary protection.
1 Positive (+) bar
2 Negative (-) bar
3 Circuit breaker
4 Fuse
• In all cases, observe the recommended breaker / fuse
ratings provided in the product's documentation.
Important:
Be aware that the suitable fuse rating for the thermal
breaker or fuse is dependent on the number of
devices you are connecting.
Power cable extension
If you need to extend the length of the power cable
supplied with your product, ensure you observe the
following advice:
• The power cable for each unit in your system should
2 ) cable. be run as a separate, single length of 2-wire cable
from the unit to the vessel's battery or distribution
panel.
• For power cable extensions, a minimum wire gauge
of 16 AWG (1.31 mm ) is recommended. For cable runs
2
longer than 15 meters, you may need to consider a
thicker wire gauge (e.g. 14 AWG (2.08 mm
AWG (3.31 mm 2 ) ).
• An important requirement for all lengths of power
cable (including any extension) is to ensure that there
is a continuous minimum voltage at the product's
power connector of 10.8 V dc, with a fully flat battery
at 11 V dc.
Important: Be aware that some products in your
system (such as sonar modules) can create voltage
peaks at certain times, which may impact the voltage
available to other products during the peaks.
Grounding
Ensure that you observe any separate grounding advice
provided in the product's documentation.
More information
It is recommended that best practice is observed in all
vessel electrical installations, as detailed in the following
standards:
• BMEA Code of Practice for Electrical and Electronic
Installations in Boats
• NMEA 0400 Installation Standard
• ABYC E-11 AC & DC Electrical Systems on Boats
• ABYC A-31 Battery chargers and Inverters
• ABYC TE-4 Lightning Protection
2 ), or 12
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