17 Power Sources
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - SCV Code - Code of Safety for Small Commercial Vessels Operating in the Caribbean - Chapter IV - Machinery - Part D - Electrical Arrangements - 17 Power Sources

17 Power Sources

  17.1 Each vessel that relies on electricity to power the following loads shall be arranged so that the loads can be energized from two sources of electricity:

  • .1 fuel system;

  • .2 fire main;

  • .3 fixed fire fighting systems;

  • .4 bilge system;

  • .5 steering system;

  • .6 propulsion system and its necessary auxiliaries and controls;

  • .7 vessel’s service and emergency electrical generation system and its necessary auxiliaries;

  • .8 a system identified by the Administration as being crucial to the survival of the vessel or to the protection of the personnel on board;

  • .9 interior lighting except for decorative lights;

  • .10 communication systems including a public address system required under regulation VII/6 ;

  • .11 navigation equipment and lights; and

  • .12 illumination of the survival craft launching and embarkation areas and man overboard rescue equipment and rescue areas.

  17.2 A vessel with batteries of adequate capacity to supply the loads specified in IV/17.1 for three hours, or a generator or alternator driven by a propulsion engine, complies with the requirement of IV/17.1.

  17.3 Where a vessel service generator driven by a propulsion engine is used as a source of electrical power, a vessel speed change, throttle movement or change in direction of the propeller shaft rotation shall not interrupt power to any of the loads specified in IV/17.1.

  17.4 Each generator and motor shall be:

  • .1 in a location that is accessible, adequately ventilated, and as dry as practicable; and

  • .2 mounted above the bilges to avoid damage by splash and to avoid contact with low lying vapors.

  17.5 A voltmeter and an ammeter shall be provided for a generator rated at 50 volts or more. For each alternating current generator, a means for measuring frequency shall also be provided.

  17.6 Each generator shall be protected by an overcurrent device with set value not exceeding 115 per cent of the generator full load rating.

  17.7 A dual voltage generator installed on a vessel shall be of the grounded type, where:

  • .1 the neutral of a dual voltage system shall be solidly connected at the switchboard’s neutral bus; and

  • .2 the neutral bus shall be connected to ground.

Parent topic: Part D - Electrical Arrangements
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