Appendix C: Grounding and RF protection
154
About marine DC systems
C.2 About marine DC systems
C.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
.
C.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 aluminum vessels.
BATTERY
ALTERNATOR
STARTER
MOTOR
+
-
BATTERY
+
-
B+
B-
SWITCHBOARD
SWITCH
(ON/OFF)
STARTER RELAY
(ON/OFF)
OUTGOING CIRCUITS
GAUGES
ENGINE
SENSORS
-
+
ISOLATOR
Summary of Contents for FB250
Page 13: ...Table of contents xii ...
Page 77: ...Chapter 3 Connecting power 64 Connecting power ...
Page 105: ...Chapter 5 Starting up the system 92 Operating the system ...
Page 129: ...Chapter 6 Service and repair 116 Replacing modules in 34 3052B antenna ...
Page 139: ...Chapter 7 Troubleshooting 126 Logging of events ...
Page 165: ...Appendix B Technical specifications 152 TracPhone terminal ...
Page 197: ...Glossary 184 ...