4-9
41 Cantius
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 12-volt 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 12V 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 there 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 and an optional battery charger for the optional bow thruster
battery. 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 ground 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 3 inches
(0.076 m) 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.
DANGER
A glowing red polarity light indicates that a reversed
polarity electrical shock hazard exists and damage to
appliances will occur. DO NOT use shore power while
the red light is on. Disconnect the shore cord and
have the shore outlet serviced by a qualified
electrician before using.
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 as well.
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