ELECTRICAL
LOADS
AND CONNECTIONS
All of thefollowing description pertains to alternating
currrenLOnan electric generating sets for recrea-
tional vehicles.
1.
All wiring must meet applicable local electrical
codes. Have a qualified electrician install and
inspect the wiring.
2.
Wires must be adequate size, properly insulated
and supported in an approved manner.
3. Mount switches and controls securely to prevent
damage from vibration and road shocks. All
switches must be vibration-proof to prevent ac-
cidental opening orclosing whilethe vehicle is in
motion.
4.
Install an approved junction box for feeder
con-
ductors from the electric generating set. It must
have a blank cover and be inside compartment
(not on set).
WARNING
To prevent noxious gases from entering
vehicle interior, seal any openings made
in the set's compartment for conduit, wiring, etc. Sickness or
asphyxiation may result.
WIRE
TYPES
Use multistrand wire which meets all applicable
codes as feeder conductors, from electric generating
set to compartment junction box. Many installers use
multistrand wire throughout the vehicleto reduce the
danger of breakage from vibration.
The conductors of the electric generating set shall
have an ampacity not less then 115 percent of the
nameplate current rating of the generator. Neutral
conductors shall be the same size as the conductors
of the outside legs.
Supply conductors from the electric generating set to
the junction box on the compartment wall must be
installed in flexible metalic conduit.
CAUTION
Do not use solid metal conductors in com-
partment. They may develop metal fatigue
from set movement and eventually break.
RECONNECTIBLE,
SINGLE-PHASE
GENERATOR
Voltage selection on reconnectible single-phase
generators is for use as 120/240 volts, 3-wire; or 120
volts,
2 wire. Balance the load when connecting for
three wire service. Current for any one output lead
must not exceed nameplate rating. When two or more
single-phase circuits are available, divide the load
equally between them. See Figure 6.
SAFETY
DISCONNECT
The feeder conductors from the set compartment
must terminate in a three-pole, double-throw,
posi-
tive off, switching device for 120/240 operation ahead
of the vehicle distribution panel. This assures the
outside power source cannot be connected simul-
taneously with the electric generating set. Neutral
must be switched.
WARNING
WARNING
Because of fire hazard, do not tie electrical
wiring to fuel line.
Use only approved power supply assemblies.
Never remove grounding pin from power
supply assembly. Incorrect or no ground may cause the recrea-
tional vehicle to be electrically "hot." This is a potential shock
hazard.
On recreational vehicles which have provisions for
using outside AC utility power (separate from the
electric generating set) the neutral as well as the
"HOT" lead MUST be completely isolated from the
RV when load or power is switched.
The operation of a typical transfer device is shown in
Figure 7. In addition to the transfer device, an over
current protection device (circuit breaker or fuse)
shall be provided between the transfer device and the
AC circuit in RV. A ground fault circuit interrupter
should be installed in the wiring system to protect all
branch circuits.
STARTING
CONTROLS
Remote control Onan electric generating sets are
designated by an "R" in the model number and allow
the operator to start the set inside the vehicle. Refer to
operator's manual for specific information.
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