1
Electrical installations
A faulty electrical installation can generate stray
currents from the electrical system. Stray currents
can weaken the galvanic protection of the propeller,
propeller shaft, rudder, keel etc., and cause damage
because of electrochemical corrosion.
IMPORTANT! Work on the low voltage circuits
in the boat should be done by a person with
electrical training or knowledge. Installation or
work on land current equipment must only be
done by a competent electrician, in accordance
with local regulations for mains electricity.
Always consider the following:
1. If land current is connected, its protective earth
must be connected ashore, never to the boat.
The land current installation must also be provi-
ded with an earth fault breaker (RCCB). The land
current installation (transformer, inverter, battery
charger etc. ) must be intended for marine use,
where the high voltage section is galvanically
isolated from the low voltage section.
2. Electrical cables must be installed and clamped
in such a way that they are not exposed to cha-
fing, damp or splashing water in the bilge.
3. Protectiveearth cables forradio,navigation equipProtective earth cables for radio, navigation equip
ment, rudder, bathing steps etc., or other equip-
ment which uses protective earthing, shall be
connected to a common earthing point which is
not connected to the engine or reverse gear.
IMPORTANT! The engine and reverse gear
must never be used as earth planes.
4. The starter batteryshall have amain switch onThe starter battery shall have a main switch on
the positive (+) side of the battery. The main
switch must disconnect all loads and shall be
switched off when the boat is not used.
5. If an extraauxiliarybatteryisused, amain switchIf an extra auxiliary battery is used, a main switch
(1) must be connected between the auxiliary
battery positive (+) pole and the fuse box for the
boat’s electrical equipment. The main switch must
disconnect all loads connected to the auxiliary
battery and shall be switched off when the loads
are not used.All equipment connected to the
auxiliary battery shall have separate switches.
NOTE! A charge splitter (optional) should be installed
to charge two independent battery circuits from the
standard alter nator.
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Maintenance. Electrical system
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