Section 9 Electrical equipment

9.1.1 The requirements of Pt 1, Ch 4, 2.2 Intermediate Surveys 2.2.9 and Pt 1, Ch 4, 2.2 Intermediate Surveys 2.2.13 are to be complied with as far as applicable.

9.2.1 An electrical insulation resistance test is to be made on the electrical equipment and cables. The installation may be sub-divided or equipment, which may be damaged, disconnected for the purpose of this test.

9.2.2 The fittings on the main and emergency switchboards, section boards and distribution boards are to be examined and over-current protective devices and fuses inspected to verify that they provide suitable protection for their respective circuits.

9.2.3 Generator circuit-breakers are to be tested, so far as is practicable, to verify that protective devices including preference tripping relays, if fitted, operate satisfactorily.

9.2.4 The electric cables and their securing arrangements are to be examined, so far as is practicable, without undue disturbance of fixtures or casings unless opening up is considered necessary as a result of observation or of the tests required by Pt 1, Ch 4, 9.2 Complete Surveys 9.2.1.

9.2.5 The generator prime movers are to be surveyed as required by Sections Pt 1, Ch 4, 7 Gas turbines - Detailed requirements and Pt 1, Ch 4, 8 Oil engines - Detailed requirements and the governing of the engines tested. The motors concerned with essential services together with associated control and switch gear are to be examined and if considered necessary, are to be operated, so far as is practicable, under working conditions. All generators and steering gear motors are to be examined and are to be operated under working conditions, though not necessarily under full load or simultaneously.

9.2.6 Where transformers or electrical apparatus associated with supplies to essential services are liquid filled or cooled by a liquid in direct contact with current carrying parts, the owner is to arrange for samples of the liquid to be taken and tested, by a competent authority, in accordance with the equipment manufacturer's requirements, and a certificate giving the test results is to be furnished to the Surveyor.

9.2.7 Navigation light indicators are to be tried under working conditions, and correct operation on the failure of supply or failure of navigation lights verified.

9.2.8 The emergency sources of electrical power, where fitted, together with their automatic arrangements and associated circuits are to be tested.

9.2.9 Emergency lighting, transitional emergency lighting, supplementary emergency lighting, general emergency alarm and public address systems are to be tested as far as practicable.

9.2.10 Where the yacht is electrically propelled, the propulsion motors, generators, cables and all ancillary electrical gear, exciters and ventilating plant (including coolers) associated therewith are to be examined, and the insulation resistance to earth is to be tested. Special attention is to be given to windings, commutators and slip-rings. The operation of protective gear and alarm devices is to be checked, so far as is practicable. Liquids for filling and cooling, if used, are to be tested in accordance with Pt 1, Ch 4, 9.2 Complete Surveys 9.2.6. Interlocks intended to prevent unsafe operations or unauthorised access are to be checked to verify that they are functioning correctly. Emergency overspeed governors are to be tested.

9.2.11 Where batteries with charging power higher than 2kW provide the source of power for any essential services, their installation, including charging and ventilation, is to be examined.

9.2.12 Sufficient battery capacity shall be verified for Lithium-Ion battery system installations used as the primary power source for emergency systems.

9.2.13 Where Lithium-Ion batteries with total system capacity exceeding 20 kWh are used as the primary power source for essential or emergency systems, a test of all required monitoring and safety functions shall be carried out.

9.2.14 A test of the safety functions in spaces or compartments containing Lithium-Ion batteries with total system capacity exceeding 20 kWh used as power source for essential and emergency services shall be carried out, i.e., fire detection and extinguishing, gas detection, ventilation etc. as applicable to the installation.