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Old 10-01-2015, 01:51 PM   #21
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Originally Posted by donjbray56 View Post
Not sure what the problem is with running it from 110V 15 amp circuit. It is the same voltage as the 30 amp circuit. The only thing that will happen is that the breaker will trip if you draw more than 15 amps. How does it hurt the refrigerator?
A 15 amp circuit is not wired heavy enough .

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Old 10-01-2015, 02:37 PM   #22
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Not sure what the problem is with running it from 110V 15 amp circuit. It is the same voltage as the 30 amp circuit. The only thing that will happen is that the breaker will trip if you draw more than 15 amps. How does it hurt the refrigerator?
it all boils down to voltage drop. If you run an appliance with a motor or compressor on too small a circuit the voltage will drop. When that appliance gets low voltage it tries to make up for the low voltage by drawing more current, amps. More amps makes much more heat in the appliance and that wears out the appliance MUCH quicker. All that can happen without ever tripping a breaker.
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Old 10-01-2015, 02:53 PM   #23
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So, my 15 amp circuit (with 12-2 wire) will have a 3% voltage drop at 50 feet, I am at half that distance, so say less than 2% and since my voltage is 118V, I think I am good.
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Old 10-01-2015, 03:02 PM   #24
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Originally Posted by donjbray56 View Post
So, my 15 amp circuit (with 12-2 wire) will have a 3% voltage drop at 50 feet, I am at half that distance, so say less than 2% and since my voltage is 118V, I think I am good.
Under ideal conditions sure.
Heat and humidity isn't figured in


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Old 10-01-2015, 03:32 PM   #25
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A 15 amp circuit is not wired heavy enough .

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Well I hope a 15 amp circuit is wired heavy enough for 15 amp and probably if your house is wired to code ( now the key word here is "probably") then the wire required is more than needed to supply just 15 amps.

I guess I will run mine until it burns up or my house burns down.. Actually I don't think either will happen..
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Old 10-01-2015, 05:46 PM   #26
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AC on limited amperage

Over the years I've had times when I didn't have all the current I wanted and the weather was very hot. If you need to run the system on 15 or 20 amps just make sure that other electrical items are off and you might even want to disable the 12 volt converter/charger if things are close. The AC on most trailers draws between 11 and 15 amps and will operate down to about 100 volts without problems. Keep your extension cords as short as possible and they should be heavy enough for the load. - Have a cool night.
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Old 10-01-2015, 10:48 PM   #27
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What happened to the 120 volt system in the house?
They are nominally 120 volts. Check your outlets with a volt meter. Many call it 110. Whatever floats their boat.

I run the A/C and fridge on 15 amp at home to prep for a trip until I can afford to have an electrician install a 30 amp plug.
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Old 10-01-2015, 11:14 PM   #28
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I have been told not to run the a/c on anything but a 30 amp circuit. I didn't ask why, just listened to the advice. They said damage will occur.
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Old 10-02-2015, 02:01 AM   #29
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it all boils down to voltage drop. If you run an appliance with a motor or compressor on too small a circuit the voltage will drop. When that appliance gets low voltage it tries to make up for the low voltage by drawing more current, amps. More amps makes much more heat in the appliance and that wears out the appliance MUCH quicker. All that can happen without ever tripping a breaker.
Would this be reflected in a hard-wired PI EMS display?
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Old 10-02-2015, 08:38 AM   #30
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Would this be reflected in a hard-wired PI EMS display?
Absolutely. If you were plugged into a weak circuit the voltage would readout low. The EMS is set so that if the voltage was too low it would shut off all the power. Mine protected me from low voltage at the beginning of camping season this year. We got the campground electrician out there and he fixed something and then we had good power.
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