Appendix C: Grounding and RF protection
TT-98-129218-A
About marine DC systems
57
One Pole Grounded Return System
This configuration implies that the battery negative is bonded to a ground potential, typically at
the engine negative terminal. This is done in order to polarize the DC electrical system.
Note
This arrangement is not suitable for steel and aluminum
vessels as this might cause electrolytic corrosion of the hull.
BATTERY
ALTERNATOR
STARTER
MOTOR
+
-
BATTERY
+
-
B+
B-
SWITCHBOARD
SWITCH
(ON/OFF)
STARTER
RELAY
(ON/OFF)
OUTGOING CIRCUITS
GAUGES
ENGINE
SENSORS
+
-
HULL/KEEL/ENGINE
(VESSEL GROUND)
