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Wednesday, April 24, 2013

Electrical Equipment and Installation

Surveyors should ensure that the details and arrangements of the electrical equipment and its installation
comply with the statutory regulations. Generators, motors and transforming equipment intended for services in connection with the propulsion and safety of the ship should be inspected during construction. The works and shipboard tests should also be personally supervised. Machines and transforming equipment of less than 100kW could be accepted without survey at the manufacturing works if satisfactory maker's test certificates are supplied detailing the results of tests to determine the operating characteristics, temperature rise, insulation resistance and dielectric strength. Where reasonably practicable, installations and equipment should be designed and located such that services which are essential for the propulsion and safety of the ship will not fail in the event of partial flooding of the ship's machinery space. Due consideration should be given to space limitations and the intended service of the ship. The load shedding, or other arrangements provided, should not interfere with the supply to electrical services which are essential for the propulsion and safety of the ship and which must be maintained after shedding non- essential loads. The essential services include those auxiliaries necessary for propulsion, bilge and fire pumping, navigation lights, essential lighting, steering gear, navigational aids required by the Merchant Shipping Regulations, communication and alarm systems required for safety, watertight doors and engine and boiler room ventilation. Source: MCA

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