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Old 06-23-2018, 05:55 PM   #1
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Electrical Issues

I realize that I am electronically challenged, so please bear with me. The attached photo shows that I am pulling more than 40 amps on one leg and 15 +/- amps on the other. When we run the microwave and the 2nd a/c, lately the shore breaker has been tripping.

So today while doing some baking, we turned the 2nd a/c off. The top leg showed 31/32 amps while the bottom leg showed 15/16 amps. So to experiment, we let the microwave cool down, then turned the front a/c off as well. We also turned all the lights off. With that scenario, the top leg was at 32/33 amps and bottom was 0 amps. Turned 2nd a/c on and top leg went to 41 amps. Turned front a/c on and the photo reflects what the result was.

Is that normal or should the top leg be much lower? Like I said....extremely challenged.
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Old 06-23-2018, 06:06 PM   #2
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The idea of split phase power is that each leg can be different than other. That alone is not an issue. Where the difference is going might be. Try the following questions:
Electric or propane water heater?
Any other high draw appliances plugged in?
House batteries fully charged or charging?
That's 3 things I can think of off hand that could add 10 amps to one leg. There are probably more. The easy way to find out is to use circuit breakers or other controls to disable each load and then see what changes.
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Old 06-23-2018, 06:27 PM   #3
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Quote:
Originally Posted by nothermark View Post
The idea of split phase power is that each leg can be different than other. That alone is not an issue. Where the difference is going might be. Try the following questions:
Electric or propane water heater?
Any other high draw appliances plugged in?
House batteries fully charged or charging?
That's 3 things I can think of off hand that could add 10 amps to one leg. There are probably more. The easy way to find out is to use circuit breakers or other controls to disable each load and then see what changes.
Okay. I think I see where you are going. We havd an Aquahot which is currently on electric, so I imagine that would draw quite a bit? Batteries are float charging.
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Old 06-23-2018, 06:45 PM   #4
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How about the block heater ?

That's good for 8 or 9 amps.
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Old 06-24-2018, 05:54 AM   #5
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I made a list of components and the leg they are on, I got tired of having the shore power 50 amp breaker trip. Leg 2 on my coach is usually the culprit as it is easy to exceed 50 amps just by turning the coffee pot on.

Leg 1 is Front A/C, AquaHot HI 17 amps, InstaHot 7 amps

Leg 2 is Middle and Rear A/C, AquaHot Low 17 amps and the Kitchen (Galley)
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Old 06-26-2018, 09:04 PM   #6
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Quote:
Originally Posted by hypoxia View Post
I made a list of components and the leg they are on, I got tired of having the shore power 50 amp breaker trip. Leg 2 on my coach is usually the culprit as it is easy to exceed 50 amps just by turning the coffee pot on.

Leg 1 is Front A/C, AquaHot HI 17 amps, InstaHot 7 amps

Leg 2 is Middle and Rear A/C, AquaHot Low 17 amps and the Kitchen (Galley)
That was a great idea. Although the breakers are labeled, they do not show everything that is that line. I had always "assumed" that the legs on the monitor panel correlated to the electrical panel and sub panel. Not so! So now I have a better look at how the coach is wired.
Thanks to everyone for your help.
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