General Cabling Guidance; Cable Types And Length; Routing Cables; Strain Relief - Raymarine RAY53 Installation & Operation Instructions

4.1 General cabling guidance

Cable types and length

It is important to use cables of the appropriate type and
length
• Unless otherwise stated use only standard cables of
the correct type, supplied by Raymarine.
• Ensure that any non-Raymarine cables are of the
correct quality and gauge. For example, longer power
cable runs may require larger wire gauges to minimize
voltage drop along the run.

Routing cables

Cables must be routed correctly, to maximize
performance and prolong cable life.
• Do NOT bend cables excessively. Wherever possible,
ensure a minimum bend diameter of 200 mm (8 in) /
minimum bend radius of 100 mm (4 in).
• Protect all cables from physical damage and exposure
to heat. Use trunking or conduit where possible. Do
NOT run cables through bilges or doorways, or close
to moving or hot objects.
• Secure cables in place using tie-wraps or lacing twine.
Coil any extra cable and tie it out of the way.
• Where a cable passes through an exposed bulkhead
or deckhead, use a suitable watertight feed-through.
• Do NOT run cables near to engines or fluorescent
lights.
Always route data cables as far away as possible from:
• other equipment and cables,
• high current carrying AC and DC power lines,
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• antennas.

Strain relief

Ensure adequate strain relief is provided. Protect
connectors from strain and ensure they will not pull out
under extreme sea conditions.

Circuit isolation

Appropriate circuit isolation is required for installations
using both AC and DC current:
• Always use isolating transformers or a separate
power-inverter to run PC's, processors, displays and
other sensitive electronic instruments or devices.
• Always use an isolating transformer with Weather FAX
audio cables.
• Always use an isolated power supply when using a
3rd party audio amplifier.
• Always use an RS232/NMEA converter with optical
isolation on the signal lines.
• Always make sure that PC's or other sensitive
electronic devices have a dedicated power circuit.

Cable shielding

Ensure that all cables are properly shielded and that the
cable shielding is undamaged.

Connections to other equipment

Requirement for ferrites on non-Raymarine cables
If your Raymarine equipment is to be connected to other
equipment using a cable not supplied by Raymarine,
a suppression ferrite MUST always be attached to the
cable near the Raymarine unit.

Dust caps

To prevent potential water ingress, connectors not in
use should be protected using the supplied dust caps.

Bare end wire connections

Your product is supplied with bare end wire connections.
You must ensure that ALL bare end wires are adequately
protected from short circuit and water ingress.
Bare ended wire connections
It is recommended that bare ended wire connections are
made by soldering or using crimp connectors and then
protected by wrapping the connection in insulation tape.
Unused bare ended wires
Any unused bare ended wires should be folded back
and wrapped in insulation tape.
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