Specifications

• The power cable supplied with your product may NO
T
include a separate drain wire. If this is the case, only
the power cable’s red and black wires need to be
connected.
• If the power cable is NOT supplied with a fitted inline
fuse, you MUST fit a suitably rated fuse or breaker
between the red wire and the battery’s positive
terminal.
• Refer to the inline fuse ratings provided in the
product’s documentation.
• If you need to extend the length of the power cable
supplied with your product, ensure you observe the
dedicated
Power cable extensions advice provided in
the product’s documentation.
1
Waterproof fuse holder containing a
suitably-rated inline fuse must be fitted.
For suitable fuse rating, refer to:
In-line
fuse and thermal breaker ratings
.
2
Product power cable.
3
Drain wire connection point.
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.
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.
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
be run as a separate, single length of 2-wire cable
from the unit to the vessel's battery or distribution
panel.
• Ensure that the extension cable is of a sufficient gauge
for the supply voltage and the total load of the device
and the length of the cable run. Refer to the following
table for typical minimum power cable wire gauges.
Cable length in
meters (feet)
Wire gauge in
AWG (mm
2
) for
12 V supply
Wire gauge in
AWG (mm
2
) for
24 V supply
<8 (<25) 16 (1.31 mm
2
) 18 (0.82 mm
2
)
16 (50) 14 (2.08 mm
2
) 18 (0.82 mm
2
)
24 (75) 12 (3.31 mm
2
) 16 (1.31 mm
2
)
>32 (>100) 10 (5.26 mm
2
) 16 (1.31 mm
2
)
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.
Important: To ensure power cables (including any
extension) are of a sufficient gauge, ensure that
there is a continuous minimum voltage of 10.8 V dc
at the end of the cable where it enters the product’s
power connector, even with a fully flat battery at 11 V
dc. (Do not assume that a flat battery is at 0 V dc.
Due to the discharge profile and internal chemistry
of batteries, the current drops much faster than the
voltage. A “fully flat” battery still shows a positive
voltage, even if it doesn’t have enough current to
power your device.)
Grounding
Ensure that you observe any additional 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
Cables and connections
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