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Chapter 4
TYPICAL AC MAIN AC CONTROL PANEL
REVERSE POLARITY INDICATOR
Before activating the AC panel main breaker visually
check for a green light at the reverse polarity indicator.
The green light indicates there is no reverse polarity. If
the red light appears on the reverse polarity indicator a
hot wire and ground may be reversed somewhere in the
circuit from the dock to the main panel or there may be
an over current condition.
In all cases do not activate the main panel breaker. Take
immediate corrective action to nd the cause of the re-
verse polarity situation. At this point, disconnect the
shorepower cord from the marina power center and call
for professional assistance.
PANEL MAIN BREAKERS
The main panel 30 amp breaker deliver electricity through
a system of sub breakers to the entire boat. Turn any sub
breakers found “on” to the “off ” position. This prevents
any excessive equipment motor draws and may eliminate
any system arcing.
With the reverse polarity indicator showing the green icon,
activate the main breaker by pushing the single throw arm
to the on position. Notice that each breaker is marked
with the on and off terminology, AC electricity now is
distributed to the 120 volt leg B of the panel. Follow the
same procedure for the main breaker for leg A.
Turn on sub breakers as needed always being conscious
of the load current meters..
LINE VOLTAGE/CURRENT METERS
After the shore power 30 amp main breaker is activated
line voltage will display on the line voltage meter of the
main panel. As equipment breakers are activated the load
current meter (extreme right side of panel) will show an
amperage draw. Normally the amperage will ascend as
more equipment breakers are activated and will descend
as equipment breakers are deactivated.
As equipment breakers are activated the load current
(amperage) meter will ascend and descend as equipment
breakers are deactivated.
As a general note on equipment breakers when leaving
the boat it is recommended that most breakers be turned
off.
It may be necessary to leave the battery charger on dur-
ing extended periods and the salon refrigerator. Since the
refrigerator is dual voltage (12 and 120) make sure the DC
refrigerator breaker is activated and the AC refrigerator
breaker is deactivated upon leaving the vessel.
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