Simrad SC90, Installation Manual

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419050/B
67
Requirements for electrical installations, cables and
communication
The electrical installations in the sonar room must meet minimum requirements to
provide suitable lights and supply power.
Light requirements
The sonar room must be equipped with suitable lighting to simplify the installation
and to aid future maintenance.
Communication requirements
The sonar room must be equipped with a telephone, an intercom system, or any other
means of oral communication between the sonar room and the bridge and/or control
room(s).
Power requirements
Each unit in the sonar room should be provided with a separate circuit breaker on the
mains supply.
A minimum number of additional electrical outlets must be provided for other equipment.
Proper vessel ground must be provided.
Cabling requirements
The sonar room units are connected to other SC90 units located in different compartments
on the vessel. The units may also be connected to peripheral devices. If these cables
pass through hatches or areas where they may be damaged, they must be run in conduits.
Minimum 2” conduit is recommended.
Make sure that all system cables are properly connected and secured, and installed
with some slack. The slack is essential to withstand vibrations, and to facilitate future
maintenance and replacements.
Verify that the transducer cable is placed in such a manner that the transducer can be
lowered and hoisted without damaging the cable.
Requirements for bilge pump and decking
If the sonar room is located below the water line, it must be connected to the vessel's
bilge pump system.
Bilge pump requirement
If it is not possible to connect the sonar room to the vessel's bilge pump system, a
separate bilge pump for the compartment must be installed.
Preparations