12.1.1 A test
for insulation resistance is to be made on the cables, switchgear,
generators, motors, heaters, lighting fittings, etc. and the insulation
resistance is to be not less than 100 000Ω between all insulated
circuits and earth. The installation may be subdivided to any desired
extent by opening switches, removing fuses or disconnecting appliances
for the purpose of this test. The readings of the insulation resistance
test are to be recorded.
12.1.2 The fittings
on main and emergency switchboards, section boards and sub-distribution
fuse boards are to be examined and overcurrent protective devices
and fuses inspected to verify that they provide suitable protection
for their respective circuits.
12.1.3 Generator,
switchgear and associated equipment are to be tested, so far as practicable,
to verify that protective devices operate satisfactorily.
12.1.4 The electric
cables are to be examined, so far as is practical, 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 3, 12.1 Complete Surveys 12.1.1. Tests are to be carried out
to demonstrate the effectiveness of earth bonding straps, where fitted.
12.1.5 The generator
prime movers are to be surveyed as required by Pt 1, Ch 3, 11 Engines – Detailed requirements and the governing of the engine tested. The motors
concerned with essential services together with associated control
and switchgear are to be examined and if considered necessary, are
to be operated, so far as 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.
12.1.6 Navigation
light systems including indicators and associated alarms if fitted,
are to be examined and tested.
12.1.7 In passenger
ships, the emergency source of power and its associated circuits and
where fitted, the temporary source of power and its automatic arrangements
are to be tested.
12.1.8 If on
cargo ships an emergency source of power has been fitted, this system
and its associated circuits are to be tested.
12.1.9 Electrical
equipment such as cables and certified safe type of equipment fitted
in dangerous zones and spaces on tankers intended for the carriage
of flammable gases and/or liquids is to be examined. Tests are to
be carried out to demonstrate the effectiveness of earth bonding straps,
where fitted.
12.1.10 Battery
compartments, lockers and boxes together with their ventilation compartments
are to be examined.