Jayco Embark 2023 120-Volt 50 AMP AC Electric System User Manual
120-Volt 50 AMP AC Electric System
The 50 AMP 120-volt 60hz AC electrical system can be powered by an outside 120/240-volt 60hz utility service like those commonly found in campgrounds or by 120/240-volt 60hz generator power. The entire system is designed to operate on 2 legs of 120-volt power at a maximum current flow of 50 amperes per leg. Exposure to voltages higher or lower than a nominal 120-volts, will damage or shorten the service life of the electrical system and appliances. The 50 AMP 120-volt 60hz AC electrical system can be powered by an outside 120/240-volt 60hz utility service like those commonly found in campgrounds or by 120/240-volt 60hz generator power. The following electrical components will only operate when connected to 120-volt power: air conditioner(s), refrigerator, microwave oven, television(s), home theater system(s), water heater, washer, dryer, fireplace, electric stove, and appliances plugged into convenience receptacles. These components will create a surge on the inverter.
Circuit breakers and fuses will not offer complete protection of the electrical system in the event of power surge or voltage spike.
Make certain the external power source you connect the power cord to is a properly wired 50 amp NEMA 14-50 RV receptacle and not 240 volt AC. PLUG INTO 50-AMP SERVICE ONLY.
- Do not hook up the power cord to any receptacle until you have verified proper polarity and grounding. Polarity indicators can be purchased in most electrical and hardware stores.
- Do not use any cheater plug, adapter or extension cord to reconfigure incoming AC power or break the continuity of the circuit connected to the grounding pin.
- Do not connect the power cord into an outlet that is not grounded, or adapt the power cord plug to connect it to a receptacle for which it is not designed.
- Do not remove the grounding pin to connect to a non-grounded receptacle. Removal of the ground pin disables an important safety feature designed to prevent shock and electrocution hazards.
- Do not connect the power cord to an extension cord. Use of an improper extension cord will cause overheating of the cord as well as potentially causing premature failure of the AC equipment.
It is the responsibility of the owner of the electrical receptacle to ensure that the receptacle is properly wired and grounded. Reverse polarity and/or improper grounding of your recreation vehicle can cause personal injury or death. The 50 AMP external utility power cord is commonly referred to as the “shore” power cord. It is designed to mate and properly function with 50 AMP “shore” power receptacles avail-able at most campgrounds. The shore power cord is designed to continuously carry the 50 AMP current flow required to power each leg of the electrical system. It also creates a critical ground connection between the vehicle electrical system and the campground shore power receptacle. Always test the external power source (i.e., the campsite power receptacle or electrical box) with a ground monitor before connecting your power cord to it. If the ground monitor indicates ‘reverse polarity’ or an ‘open ground’. DO NOT connect the power cord. Regularly inspect the shore power cord for cuts, cracks, worn insulation and other damage. Have the power cord replaced immediately if problems exist.
Calculating 50 AMP Electrical Load (if so equipped)
When connecting appliances to the electrical system, 120-volt power usage is limited to 50 AMPs per electrical system leg for a total of 100 amps. Operating appliances collectively place an added load on your 120-volt electrical system. A circuit breaker “trip” may occur if you overload the recreation vehicle and/or campground electrical system. The amperage rating of individual appliances can be calculated by dividing appliance wattage consumed (normally listed on the appliance) by nominal design volt-age (120 for a 120-volt appliance). For example, 1200 watts divided by 120 volts equals 10 amps.
Your motor home is equipped with a diesel-powered generator. The generator produces 120 240-volt power compatible with the motor home electrical system. It can power the entire motor home when 120/240-volt shore power is not available.
CARBON MONOXIDE IS DEADLY! Do not run the generator when your motor home is indoors or in a confined space.
DO NOT use the AGS AUTO ON or QUIET ON modes (if so equipped) when your motor home is indoors or in a confined space.
Asphyxiation or carbon monoxide poisoning hazards exist whenever generator exhaust gasses can accumulate.
MOVING PARTS AND ELECTRICITY can cause severe personal in-jury or death. To reduce exposure to these hazards, always disable AGS (if so equipped) before:
- Sleeping in the vehicle, unless the vehicle has a working CARBON MONOX-IDE detector.
- Parking vehicle in garage or confined space.
- Parking vehicle for storage.
- Servicing vehicle for storage.
- Servicing generator.
- Servicing batteries.
- Servicing appliances or electrical systems.
- Fueling the vehicle.
Before Starting the Generator
- Make sure the carbon monoxide detector is working.
- Turn off air conditioners and all other 120-volt appliances.
- Check for fuel, exhaust and coolant leaks.
STOP the generator immediately if there is a fuel, exhaust or coolant leak. Have all leaks repaired prior to placing the generator back in service.
Excessive usage can overheat and damage the generator starter motor. Do not engage the starter motor for more than 20 seconds at a time. If the generator does not start after the first attempt, wait at least two minutes before beginning another start sequence. If the generator does not start after a third attempt, refer to the generator owner’s manual for additional information.
For more information, see the Automatic Transfer Switch (ATS) section.
NOTE: The diesel generator requires 12-volt power from the house auxiliary batteries to start, and draws diesel fuel to operate from the chassis fuel tank. If the fuel level in the chassis fuel tank drops to or below 1/4 full, the generator will shut off and cannot be re-started until the fuel tank is filled to above 1/4 full.
During periods of extended storage:
- Add a diesel fuel additive to the chassis fuel tank to prevent algae growth (only with a diesel fueled generator).
- Completely fill the chassis diesel fuel tank to prevent water condensation and rust in the tank (only with a diesel fueled generator).
- Cover the end of the generator exhaust pipe with screen to prevent bug and rodent intrusion.
With the exception of simple items, such as normal maintenance (i.e., oil changes, etc.), all service work should be done by an authorized repair facility. Improper adjustments can damage the generator and electrical appliances and can result in a safety hazard. Follow the generator owner’s manual for maintenance intervals and recommendations. Exercising Your Generator When storing the generator for extended periods of time, it is important to run the generator regularly to keep it in good working order. Lack of exercise can cause moisture build-up in the fuel system resulting in poor performance.
For more information on generator operation and maintenance, refer to the generator owner’s manual.
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