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out the water distribution system. The pressure water
pump will operate automatically as long as the FRESH
WATER switch is on.
NOTICE
The FRESH WATER switch is protected by the
helm fuse panel on the 238 and 258 models.
Turn the FRESH WATER switch OFF when the water tank
becomes empty, or when water will not be required for an
extended period. Visual inspection is necessary to check
the water level in the tank. Refer to Section G-2 in this
manual for additional information.
Refrigerator - A circuit breaker is provided on the battery
switch for the 278 model. On the 238 and 258 models,
the refrigerator is protected by the aft fuse panel. The
refrigerator has a separate ON-OFF switch. Refer to Sec-
tion I-1e in this manual and to the manufacturer's litera-
ture for additional information.
Stereo - The stereo has a separate switch on the unit and
is protected by a circuit breaker labeled STEREO on the
12 volt cabin panel on the 278 model and by the aft fuse
panel on the 238 and 258 models.
Sump Pump - A sump pump is used to discharge water
from the shower and sink drains overboard. It is installed
on the 258 and 278 models only. The sump pump has a
float switch which will activate the pump when the water
level rises in the sump. This pump is protected by the
SUMP circuit breaker on the 12 volt cabin panel.
If the boat is equipped with a grey water system, the wa-
ter from the shower and sinks is pumped into a holding
tank instead of overboard.
E - 7
120 (220) VOLT ELECTRICAL SYSTEM
The boat may be equipped with 30 amp, 120 volt, 60 Hertz
(or 15 amp, 220 volt, 50 Hertz) AC electrical wiring. When
the boat is connected to a shore power outlet, the AC
system supplies electrical power to items such as the
refrigerator, battery charger and receptacles.
The dockside system uses three-wire, color-coded cir-
cuitry. The black or hot wire is the ungrounded current
carrying conductor. The white or neutral wire is the grounded
current carrying conductor. The green wire, referred to as
the "equipment ground," is a grounded conductor, and under
normal conditions is not a current carrying wire. The neu-
tral wires are connected together at a buss bar. The equip-
Vista Owners Manual
10/93
ment grounds are similarly connected together at an-
other buss bar. Each hot wire is connected to, and
protected by, a circuit breaker in the distribution box.
The distribution box houses the system circuit breakers.
The standard dockside system has a main circuit breaker
which protects the overall distribution network. The MAIN
circuit breaker protects both the hot and neutral input
leads. This breaker is sensitive. The resulting power
surge which occurs when connecting the shore power
cord may cause the MAIN breaker to trip. To avoid this
power spike, turn off the MAIN breaker before plugging in
the shore power cord. Securely connect the power inlet
of the boat and the shore power receptacle. If the con-
nection is broken and later re-secured, the circuit breaker
may trip. Connections must be secure for uninterrupted
dockside service.
E - 8
DOCKSIDE OPERATION
If any abnormalities appear during dockside op-
eration, DISCONNECT the system immediately
to prevent electric shock hazards! Have the
boat's electrical system and the shoreside
receptacles checked as soon as possible.
A. Shore Power Connections
To prevent electric shock hazards, use only equ-
ipment with approved three wire electrical plug
connections. Be sure each item being used
has been tested and is free of electrical shorts
and ground faults.
Fifty foot, ten gauge, three wire, shore power cords are
provided with dockside wiring. The shore power cords
on 60 Hertz systems have 30 amp twistlock-type con-
nectors. This connector is approved by National Marine
Manufacturers Association and the American Boat and
Yacht Council.
Some marinas are not equipped with approved twistlock-
type receptacles. An adaptor is available from Four
Winns which converts the twistlock shore plug to a three
wire grounded household type plug. Use only an ap-
proved adaptor when an adaptor is necessary.
Section E
Page 6
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