Electrical System - Road Bear RV Class C 19-22' Manual

3.6. Electrical System

The motor home has 2 different electrical systems: 12 Volt DC (auxiliary
batteries) and 110 Volt AC (on board generator or external power source).
12V system:
Most electrical devices in the motor home run on 12 volt DC current: lights, fans,
water pump, monitor panel, LP Gas detector, furnace, slide out (if equipped) and
electric controls for the water heater, roof A/C and refrigerator.
The engine battery is charged by the alternator while the engine is running. The
engine battery runs cabin-related functions, while the auxiliary battery runs
coach-related functions.
The auxiliary battery will be charged in two ways:
- by running the generator or being plugged into an external power source
- by the engine alternator while driving the motor home
The power converter is "trickle" charging the auxiliary batteries while having the
110V supply and converts 110V to 12V to operate the 12V systems. The most
convenient and fastest way to charge the batteries is driving.
All motor homes have a battery disconnect switch which is located by the entry
door. Leave the switch on to assure overall function of the appliances. The only
time it should be turned off is during refueling.
Battery disconnect
110V system:
The roof A/C, microwave, 110V outlets, etc. run only on 110V power.
You must be connected with an external source of electricity (shore line) or have
the generator running to get 110V. For hook-up, pull the electrical cable out of the
side compartment and connect it to an outlet at the campground or house. It is
possible that the plug will not fit and you will need to use the adapter provided.
Turn the breaker at the power pole to "ON".
The vehicle fuse/breaker box has a brown cover (plastic or metal) and is located
inside the coach holding a series of fuses (standard 12V automotive fuses) and
110V circuit breakers.
The GFI (ground fault interrupter) is a special circuit breaker for 110V outlets. It is
usually located on an electrical outlet in the bathroom or kitchen area. If too much
current or a faulty electrical appliance is used, the RESET button pops out and
the power is interrupted. If this should occur, first unplug all devices and then
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