External Power; Lighting System - GMC 1975 Motorhome Operating Manual

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External Utilities Compartment
generator is running, and change it to 12-volts
which powers much of the MotorHome . It will
also charge the auxiliary (living area) battery
any time 120-volt current is being received . The
unit is located in the living area electrical com-
partment, next to the hall closet .
All switching operations in the power con-
verter are automatic . It should remain plugged
in at all times .
CAUTION
D-o not use living
area electrical cornpart-
ment as a storage area . The converter
must have
a free flow of air through and
around the unit . IF air flow is restricted,
the converter could overheat which could
result
in malfunction land permanent dam-
age . Do not let the unit get wet, but
do
keep it as elenn as possible to help os-
sure its long
life . The converter can be
cleaned with low pressure
air {30 PSI
mazimuml if neceswry .
EXTERNAL POWER
The external utilities compartment located
in the left side of the MotorHome contains the
21-foot power cord used for external power
connections.
To make an external power connection, re-
move the cord from the compartment and plug
it into a suitable power receptacle. All internal
switching will take place automatically. When
disconnecting from an external power source the
power cord should be plugged into the motor
generator receptacle within the external utilities
3 0
Light Switch Panel (Typical)
compartment . This connects the motor gener-
ator to the MotorHome electrical system . If the
vehicle is not equipped with a motor generator
simply coil the power cord neatly within the
external utilities compartment .
Your MotorHome's external power cord con-
tains two 120-volt circuits, rated to carry 40
amperes total. The electrical connection to be
used must be suitable for these requirements . If
the receptacle is designed to mate with the prongs
on the power cord plug, the electrical connection
can be expected to CARRY RATED LOAD .
It is recommended that the power cord not be
plugged in if the receptacle is not designed for
your plug. In this event you can use your op-
tional motor generator .
CAUTION
If the available power supply is other
than 120/240 volt, 60 cycle rating, or is
not properly grounded, it is essential
that no attempt be made to plug in .
Your MotorHome's electrical system is
not designed for such electrical systems
and connection could result in serious
personal injury or property damage .
LIGHTING SYSTEM
All the lighting throughout the MotorHome
is on the 12-volt system . Some of these lights
contain a three-way switch which allows a
choice in the amount of light given off. The
switches to these lights are located on the light
fixture itself .

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