74
12-Volt DC System
Your recreational vehicle contains two (2) separate electrical
systems. After reviewing the 120 volt A.C. system, we now move to
the 12 volt D.C. system. There are 2 separate sections in this group.
First, the exterior light system, brake turn signals, marker lights plus
a power line (if hooked up) all combined in the 7 way connector,
trailer to tow vehicle, all receiving power from battery and alternator
from tow vehicle.
Second, is the interior lights and appliances which will require some
12 volt D.C. power, supplied by a 12 volt converter and/or battery.
Converter/Load Center
A load center is basically a distribution panel with 120 Volt breakers
and 12 Volt fuses plus breakers for slide-outs. Convertor is “free-
standing” by itself. Size of convertor is measured by amp rating and
needs of the coach.
All convertors are solid state electronic components and are not field
repairable. The convertor is the “main component “ in supplying
clean 12 volt D.C. (direct current) for your coaches needs.
Functions of a convertor are as follows:
1. Transfer 120 volt A.C. power into 12 volt D.C. clean energy.
2. Charge auxiliary battery (if so equipped) as recharging is
required.
3. Supply’s 12 volt power thru out coach for interior lighting and
appliances as needed.
Convertor operates automatically with no switches for operation
whenever 120 volt A.C. power is attached.
Each convertor has a “built-in” fan for its own protection from heat.
Some have a fan that runs at all times and higher speed during
heavy use. Others have a fan that doesn't start until a designated
temperature is reached, controls by a sensor.
Convertor also has 2— 40 amp fuses for protection should battery
be hooked up backwards.
The Battery Disconnect switch as
shown has one function, to cut-off
or supply 12 volt DC power from
battery (if so equipped) to 12 volt
DC distribution system. Insert
attached red plastic key in off
position and turn 90º to “on”
position. Key won’t come out in
BATTERY DIS-
CONNECT
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