16
Chapter 5
MAIN A.C. PANEL (TYPICAL) SWITCH FUNCTIONS
A.C. LINE VOLTAGE
SHORE POWER
MAIN BREAKER
Note: Vessels with
generators use a remote
panel with a second
A.C main breaker as
part of a generator
transfer cycle.
REVERSE POLARITY INDICATOR
A.C. Line Voltage
This meter displays the alternating line voltage as read by
the A.C. panel. Normal voltage should be close to 120
volts. Sometimes the voltage reads lower because of spikes
in the current or unusually long wire runs at marinas that
cause voltage drops.
Typical A.C. Switches
The A.C. switches/breakers activate and protect
equipment functions on the vessel. Upon leaving the
vessel turn all switches and breakers to the off position.
If a breaker “pops” due to an overload it will assume a
“middle of the road” position until the thermocouple
inside the breaker cools down to the point that it can be
reset. Always determine the cause of an overload and
repair the problem before trying to reset the breaker.
30
15
20
15
10
15
20
BKR. AMPERAGE
SIZE
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