4. GROUNDING AND RF PROTECTION
4-2
4.2
About Marine DC Systems
4.2.1
Wiring systems
Two basic wiring topologies are used for marine DC system grounding:
Two-Wire Return System
and
One Pole Grounded Return System
.
4.2.2
Two-wire Return System
This configuration implies that no part of the circuit, in particular the battery negative,
is connected to any ground potential or equipment. The system is totally isolated and
includes engine sensors, starter motors etc. This arrangement is preferred for steel
and aluminium vessels.
BATTERY
+
+
-
-
SWITCHBOARD
SWITCH
(ON/OFF)
GAUGES
OUTGOING CIRCUITS
ENGINE
SENSORS
ISOLATOR
STARTER RELAY
(ON/OFF)
+
-
B+
B-
STARTER
MOTOR
ALTERNATOR
BATTERY
Summary of Contents for FELCOM251
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