4-9
460 Express Series
Basic Systems Operation
ELECTRICAL SYSTEM
Your yacht is equipped with two electrical systems: a battery powered
direct current (DC) system and a generator or shore powered
alternating current (AC) system. Both systems are controlled from the
AC/DC master panel.
The DC system supplies power to all of the yacht’s 12V electrical
circuits (lights, pumps, blowers, ignition, etc.).
The AC system supplies power to the 120/240 volt systems when the
yacht is moored at the dock or slip, or when the generator is running.
DC Electrical System
Your yacht has a 12 volt DC house system. The positive wire is hot,
and feeds current from the batteries to the various 12 volt systems
and the negative wire is the ground.
Some yacht and engine options may be equipped with up to five
batteries. There is a cranking battery for each engine or can be two
batteries in parallel for 12 volt house power, a generator battery and
an optional bow thruster battery. Not all yachts offer this as an option.
When the engines are running, all batteries are charged by the
alternators. There is a battery charger for the house and cranking
batteries. The battery chargers are powered by either the dockside or
generator 120V AC power. The generator battery is charged by the
generator.
The DC system wires are identified by three colors. Red wires are +12
volts, yellow wires are DC common and gray wires are DC control
wires. Bonding wires are green. AC system wires utilize three colors.
White wires are AC neutral. Black wires are AC hot wires in 120V AC
systems. Black and red wires are the ungrounded wires in 240V AC
power systems.
Individual harness wires are identified with wire number and function
by lettering which is printed by an ink jet printer every three inches on
the wires. This information aids in identifying wire functions for
troubleshooting. Battery cables are identified by labels on both ends
of each cable.
A bonding wire is extended through a #6 green wire from the bonding
strip to a terminal behind the instrument panel. This will facilitate
electronics installation. In addition, the handrails are attached to the
bonding system.
All batteries are isolated from each other by a battery isolator. When
the engines and ignition switches are OFF the isolator prevents house
battery loads from discharging the cranking batteries. When the
batteries are being charged by the alternators, the isolator
automatically isolates the batteries and will distribute the charge
among the batteries according to individual need.
A
DANGER
A glowing red polarity light indicates reversed polarity
electrical shock hazard exists and damage to
appliances will occur. DO NOT use shore power while
red light is ON. Disconnect the shore cord and have
the shore outlet serviced by a qualified electrician
before using.
A
DANGER
Considerable care has been taken to design a safe
electrical system to protect you from hazardous
shocks. Any modifications to the system should
always be done by an authorized Cruisers Yachts
Dealer not only to protect your warranty, but to protect
you from hazardous shock.
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