THOR Jayco Precept 2021, Owner'S Manual, Page: 84 / 173

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Section 6: Electrical System
rupt inverter/charger 120-volt AC input and/or output.
After correcting the overload condition, reset these circuit breakers to resume inverter/char-
ger 120-volt AC operation. Refer to the inverter/charger owner’s manual for additional
information.
For complete detailed operation and safety information refer to the manufacturer’s owners
guide found in your warranty packet. Follow all safety information displayed in the manual.
12-volt DC System
The majority of your motorhome lighting is powered by 12-volt electricity. The 12-volt DC
system is composed of components that will operate when the following conditions are met:
 Power is supplied by the chassis alternator when the chassis engine is running.
 12-volt DC power is supplied when the shore power cord is plugged into a 120-
volt external power source. House batteries will be charged also in most situa-
tions.
 The house batteries power many interior 12-volt components including the light-
ing fixtures, water pump, 12-volt motors, 12-volt appliances, etc, when the mo -
torhome is not connected to a 120-volt power source.
12-volt Fuse Panel
The 12-volt fuse panel is labeled to indicate fuse sizes, positions and the components pow-
ered. Fuses are located in the load center.
Replacing a Fuse
Before replacing a fuse, always turn off the electrical components protected by it.
1. Disconnect the shore power cord.
2. Inverter should be OFF.
3. Remove the fuse panel cover to check fuses.
4. Pull the fuse straight out of the fuse block.
5. Insert a new fuse of the same specified voltage, amperage rating and type in the original
location.
The fuse panel label should be kept permanently affixed to your recreation vehicle. Fuses
will not offer complete protection of the electrical system in the event of a power surge or
spike.
12-volt DC Outlet
There may be one or more 12-volt DC power outlets in your recreation vehicle. When the
12-volt DC outlet is used as a power source for an electric appliance, make sure the appli-
ance operates on 12-volt DC power and that it consumes less than 60 watts (5 amps) of
power.
Replacement fuses must be of the same voltage, amperage rating and type.
Never use a higher rated replacement fuse ; doing so may cause a fire by
overheating the RV wiring.
Keep the protective dust cap on the 12-volt DC outlet when not in use to pre-
vent ingestion of foreign material and potential short circuit conditions.
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