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Old 07-28-2015, 01:22 PM   #1
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15 Amp Service

We are looking at a state park that only has 15 amp service. We have a 31 foot 2008 Classic Limited and have the 15 amp to 30 amp connector. I am sure that we cannot run our AC, but can we run the refrigerator, fans and lights? I would plan to run the hot water heater off of LP.

Thanks in advance for all replies
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Old 07-28-2015, 01:30 PM   #2
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15 AMP is like having it plugged in at home. Should be fine with Lights, Fans, TV and fridg.
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Old 07-28-2015, 02:06 PM   #3
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15 amp service will run everything but AC, just be careful running high demand items at the same time, like hair dryers, microwaves, and coffee makers.

I have been able to run my AC off of a 15 amp circuit, but this likely wont be everyones experience.
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Old 07-28-2015, 02:11 PM   #4
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I also can run my AC on 15 amp service, everything else goes to propane (fridge, water heater, no microwave).
I'd rather have AC than use appliances on line voltage!
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Old 07-28-2015, 03:36 PM   #5
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I also can run my AC on 15 amp service, everything else goes to propane (fridge, water heater, no microwave).
I'd rather have AC than use appliances on line voltage!

Lol, a man of my own thinking...

I think air conditioning is among the best inventions of the modern era...

I am working in the shop today, heat index is 107, taking a break in my COOL Airstream is the boss!

Got to cool down and dry out!!
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Old 07-28-2015, 03:37 PM   #6
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15 Amp Service

Telluride!

I am red with heat index envy!

Dang it!

Oh, the heat index has creeped up to 108....
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Old 07-28-2015, 03:43 PM   #7
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Beware of running the AC on a 15 amp circuit. It may fire up and even run but you are risking severe damage to the compressor that will not become apparent until some time in the future (typical symptom: AC compressor failure.)
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Old 07-28-2015, 04:30 PM   #8
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My understanding of the problem tied to running on 15 amp service is low voltage. The compressor motor needs X watts. Watts = Volts x Amps. If voltage falls then the motor will try to pull more amps. More amps creates heat, potentially leading to burnout. A 15 amp circuit can be wired with smaller gauge wire. Too much draw on such a circuit can lead to low voltage.

I suggest checking voltage inside the trailer. First before turning on the AC, and again after its running. If voltage is below 110, certainly below 105, turn off the AC. If it stays above 110 it should be okay to run the AC all day without damage.

Anyway. This is what I understand.
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Old 07-28-2015, 06:36 PM   #9
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I guess 15 amps over 23 years on my classic is really pushing things!
Original cold Penguin 1!
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Old 07-28-2015, 06:38 PM   #10
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My unit has a low voltage alert and cut out.... Below 107 volts it disables the compressor.... Until that day, I'm running on 15 amps wherever I can!
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Old 07-28-2015, 06:39 PM   #11
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Besides 15 amps is 15 amps!
Voltage and voltage drop is something different.
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Old 07-28-2015, 07:18 PM   #12
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Funny thing the breaker inside my trailer for the A/C is 15 amps. Everybody is saying the A/C needs more than that but how is that possible?
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Old 07-28-2015, 07:36 PM   #13
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You figured it out! Amps is amps, however voltage drop from inferior wire size, or run can cause an increase in amp draw!
Check your start voltage, if you're close to 120v, your drop at start will be down around 109, and stabilize around 113-115, which is within most specs.
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Old 07-28-2015, 07:42 PM   #14
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Originally Posted by kscherzi View Post
My understanding of the problem tied to running on 15 amp service is low voltage. The compressor motor needs X watts. Watts = Volts x Amps. If voltage falls then the motor will try to pull more amps. More amps creates heat, potentially leading to burnout. A 15 amp circuit can be wired with smaller gauge wire. Too much draw on such a circuit can lead to low voltage.
As I recall from school, lower voltage at the unit due to the resistance in wiring that is not heavy enough (ie 15 amp circuit) will cause the compressor motor to run more slowly. An electric motor is also a generator (although less efficient) and its motion generates a "back-EMF" or reverse voltage that opposes the incoming current. If the motor runs too slowly then there is insufficient back EMF to regulate the current and the windings will overheat. The motor's acceleration period is what causes the surge when it first kicks on. That's also why your battery powered drill will fry if you keep the power on while it is stuck.
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