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CONSUMPTION OF 120-VOLT AC POWER
As owners desire and purchase more appliances as we have in our home, we must
remember a travel trailer has only 30-amps of incoming power available. Conserving and
choosing which appliance has priority in consumption needs to be part of planning.
In addition, loose items such as toasters, skillets, coffee pots, etc. are often included in
traveling cargo. Include these in your consumption planning.
12-Volt DC System
The 12-volt DC system is composed of numerous items such as converter, battery, fuses,
wire, and bulbs, both interior and exterior lighting. Explanation on these items will
follow in this section.
1
CAUTION: For the breakaway switch to be operational, an auxiliary battery
needs to be installed. Consult with your dealer to purchase the battery and
have it installed.
1
CAUTION:
Your RV has many 12-volt DC loads. When combined, they
total more power consumption than is available with the 12-volt DC con-
verter. Periodic overloads can be handled with the additional auxiliary battery for
short periods of time. It is suggested to conserve your 12-volt DC system at most
times. Prolonged overload may shorten the performance life of converter.
CONVERTER
A converter utilizes 120-volt AC power and transforms this energy into 12-volt DC
power, which is used inside of your travel trailer. 12-volt DC energy supplies power to all
interior lights and various appliances. The floor plan, and size of the travel trailer dictates
the model and output size of the converter required. Your travel trailer may have dual
power converters.
Inside of the converter is an electronic device which automatically switches between 120-
volt AC incoming power and battery power. An auxiliary battery as correctly installed
will be charged when the travel trailer is connected up to 120-volt AC power. The
converter will supply power through the fuse panel located near by, possibly in the same
compartment.
AUXILIARY BATTERY (Dealer Installed Option)
All Jayco conventional travel trailers and fifth-wheel travel trailers are designed and built
to accept a battery. A deep cycle marine type is recommended as you need longer energy
rather than cold cranking power. A battery is required to operate the breakaway switch
and also provides a source of energy when traveling and camping.
All battery packages require an “in-line” fuse and holder attached to the battery for
protection.
Maintenance on a battery is required for longer life. First, all terminals need to be kept
clean and free of corrosion. Second, a battery that is used daily or has the converter in
operation will consume water. Keep the battery filled as the cells cannot hold a charge
when the water is low. A deep cycle battery is NOT maintenance free.
In normal conditions a converter will not overcharge a battery unless (a) the battery has
low or dead cell(s), or (b) the converter has a malfunction. The charging module on some
converters have a positive shut-off and on others there is a reduced charge rate to a very
low amperage.
30-AMP SERVICE
On a 30-amp system, up to 5 circuits are permitted to distribute power through the travel
trailer. All breakers are sized according to power to be consumed.
1
WARNING:
Do not replace breakers or fuses with any that are rated
at a higher amperage. Over fusing may cause a fire by over heating the wire.
Below is a generic drawing with circuit breaker alignment. Your travel trailer may not be
exactly the same as shown depending on model, floor plan, and options.
50-AMP SERVICE
A 50-amp service is available on Designer travel trailers as an option and is standard on
Legacy fifth-wheel travel trailers. Below is a generic drawing with circuit breaker
alignment. Your travel trailer may not be configured exactly as shown depending on
model, floor plan, and options.
1
=
30-amp main, incoming power to trailer
2
=
20-amp circuit to air conditioning
3
=
15-amp microwave oven
4 & 5 =
15-amp to general purpose circuits
6
=
15-amp service for optional water heater
A = 20-amp air conditioner
E –
15-amp water heater
B = 15-amp microwave oven
F = open
C = 15-amp refrigerator and utility
G = 15-amp washer & dryer
D = 15-amp GFI and kitchen circuits
H = 20-amp air conditioner
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