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 uorescent lights.
Always route data cables as far away as possible from:
• other equipment and cables,
• high current carrying ac and dc power lines,
• antennae.
Strain relief
Ensure adequate strain relief is provided. Protect connectors
from strain and ensure they will not pull out under extreme sea
conditions.
Cable shielding
Ensure that all data cables are properly shielded that the
cable shielding is intact (e.g. hasn’t been scraped off by being
squeezed through a tight area).
4.2 Cable routing
Cable routing requirements for the transducer cable.
• Check that the cable is long enough to reach the equipment
that it will be connected to. Refer to the manual that
accompanied your sonar module for details of transducer
extension cables.
• Use grommets in any pass through holes to prevent damage
to the transducer cable.
• To prevent interference, separate the transducer cable from
any other electrical cables.
• Secure the cable at regular intervals using cable clips (not
supplied).
• Any excess cable should be coiled up at a convenient location.
20 CPT-70 / CPT-80 / CPT-110 / CPT-120
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