4-6
Section 4 Electrical System
C280 / S280 / C310 / ST310
4.5 AC System
The AC System is standard on the S 280
and S 310 and optional on the C 280 and
C 310. The AC system is fed by the shore
power connection and is equipped with on-
board galvanic isolation.
The AC current is distributed to the AC
accessories through individual circuit break-
ers located in the AC panel. The main
breaker in the panel protects the system
from an overload and the reverse polarity
light indicates problems due to an improper
shore power supply. AC outlets are pro-
tected by ground fault circuit interrupters
(GFCI) to protect against electrical shock. A
cord set is provided to supply power from
the shore power outlet to the AC shore
power inlet of the boat.
Make sure the AC ground system is func-
tioning properly and a proper connection
exists between the shore power cord and
power inlet, the boat bonding system and
the outlet ground circuits. If there is any
doubt about the integrity of the ground cir-
cuit, disconnect the AC, contact a qualified
marine electrician and repair.
To reduce the risk of electrical shock, avoid
making contact with the shore cable or mak-
ing a connection to a live shore outlet, espe-
cially in wet conditions. DO NOT spray water
on electrical cables while washing down
decks.
4.6 AC Main Distribution
The AC panel is located in the console. The
following are descriptions of the AC panel
equipment and the breakers that protect the
accessories:
AC Volt Meter
Indicates the voltage supplied to the panel.
Galvanic Isolator
The purpose of the galvanic Isolator is to
allow the boat’s bonding system to be iso-
lated electrically from the dock and other
vessels at low voltages but to maintain the
connection to the shore ground at high volt-
age. This low voltage isolation will prevent
the boat and engine zincs from protecting
the underwater fittings on another boat shar-
ing the common marina AC ground wire, so
that your anodes are protecting your boat
only. The Galvanic Isolator is of the “fail
safe” design meaning that if a failure of the
device were to occur, it will fail in a safe con-
dition that maintains the electrical path
through the green ground wire. In the “fail
safe” mode galvanic isolation will be lost to
the boat’s underwater metal fittings. Refer to
the galvanic isolator monitor owner's man-
ual.
! DANGER
ELECTROCUTION, FIRE OR
EXPLOSION HAZARD
Contact with live wires or working on
an energized electrical system can
cause electrocution. It can also cause
sparks, resulting in fire and/or explo-
sion. Both cases will result in death or
serious injury. DO NOT work on an
energized system or allow unqualified
personnel to work on the system.
AC Breaker Panel (Typical)
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