Volvo D4, Руководство оператора

Страница: 85 / 126

83
Maintenance: Electrical system
Electrical installations
Leakage current from the electrical system can be
caused by incorrect installation of electrical equip-
ment. Leakage current can knock out the galvanic
protection of components such as the drive, propel-
ler, propeller shaft, rudder stock and keel and cause
damage by electrolytic corrosion.
IMPORTANT! Work on the boat’s low tension
circuit should only be carried out by qualified or
experienced persons. Installation or work on the
shore power equipment
must only be carried
out by electricians authorized to work with high-
voltage installations.
The following should always be observed:
1. If shore power is connected, the protector ground
should be ashore, never in the boat. Shore power
should always have a ground fault circuit breaker.
Shore power units (transformer, rectifier, battery
chargers etc.) must be intended for marine usage
and the high tension circuit must be galvani-
cally separated from the low tension circuit.
2. Route and clamp electric cables so that they will
not be exposed to rubbing, damp or bilge water in
the keelson.
3. Engine or drive/reverse gear must never be used
as a ground point.
IMPORTANT! The engine or drive/reverse
gear must never be used as a ground or be
electrically connected to other equipment
such as the radio, navigational equipment,
the rudder, bathing steps etc.
Protective grounds for the radio, navigational
equipment, rudder, bathing steps or other equip-
ment with separate ground leads must be con-
nected to a common ground terminal.