Raymarine ALPHA, Installation Instructions Manual, Page: 42 / 72

10.3 Inline fuse and thermal breaker ratings
The performance display’s power cable is fitted with a waterproof fuse holder
and an 8 A inline fuse which is appropriate for up to 3 additional daisy-chain
connections. In the instance where the supplied inline fuse needs to be
replaced, or, when installing a thermal breaker, the following inline fuse and
thermal breaker ratings will apply to your product:
Important:
The suitable fuse rating for an inline fuse and thermal breaker is dependent
on the number of devices you are connecting. When connecting multiple
Alpha displays in a series (up to 4 maximum), ensure that
the fuse rating is
appropriate for the total power consumption of all daisy-chained Alpha
displays in your system
.
The ratings listed below are applicable when replacing the power cable’s
supplied 8 A inline fuse. If in doubt consult an authorized Raymarine® dealer.
Number of displays in
a series Inline fuse rating Thermal breaker rating
1 2 A 2 A
2 4 A 4 A
3 6 A 6 A
4 8 A 8 A
10.4 Power distribution
Recommendations and best practice for the power connection of products
supplied with a drain wire as part of the supplied power cable.
• The product is supplied with a power cable, either as a separate item or a
captive cable permanently attached to the product. Only use the power
cable supplied with the product. Do NOT use a power cable designed for,
or supplied with, a different product.
• Refer to the Power connection section for more information on how to
identify the wires in your product’s power cable, and where to connect
them.
• See below for more information on implementation for some common
power distribution scenarios:
Important:
• When planning and wiring, take into consideration other products in
your system, some of which (e.g. sonar modules) may place large power
demand peaks on the vessel’s electrical system, which may impact the
voltage available to other products during the peaks.
• The information provided below is for guidance only, to help protect
your product. It covers common vessel power arrangements, but does
NOT cover every scenario. If you are unsure how to provide the correct
level of protection, please consult an authorized dealer or a suitably
qualified professional marine electrician.
Implementation — connection to distribution panel
(Recommended)
Item
Description
1 Waterproof fuse holder containing a suitably-rated inline fuse
must be fitted. For suitable fuse rating, refer to:
Inline fuse and
thermal breaker ratings .
2 Product power cable.
3 Drain wire connection point.
• It is recommended that the supplied power cable is connected to a suitable
breaker or switch on the vessel's distribution panel or factory-fitted power
distribution point.
• The distribution point should be fed from the vessel’s primary power
source by 8 AWG (8.36 mm
2
) cable.
• Ideally, all equipment should be wired to individual suitably-rated thermal
breakers or fuses, with appropriate circuit protection. Where this is
42