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Clarification
Posted by Archived on May 25, 2014 at 7:01 pmNatalie was all about power management when dry camping this weekend, wanting to turn off one air conditioner to run her hairdryer. Because the generator was on I told her to not mind even though one leg was at 69. We had no blown breakers, so must have been ok.
My thought is that we only have to worry about 50 amps on one leg when connectred to shore power because of the cord. Am I correct?
Archived replied 12 years, 4 months ago 8 Members · 15 Replies -
15 Replies
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My understanding in any coach is that when the generator is running you can run everything in the bus …??? I would like clarification too !!
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It has been my understanding that some, maybe all, Liberties measure power to anything downstream of the inverters twice. That probably explains your reading. Although you get a full 50A+ out of your generator, your main power distribution panel probably is breaker protected at 50A.
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You’re seeing 69 amps because some of the sources are being doubled by both circuits running through the transformer. Mine did the same thing, micro 15 amps on inverter, 30+ on gen or shore. Water pump 7 amps on inverter, 15 on shore or gen. Actual amps not to exceed are probably around 40 on each leg.
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Well, that’s confusing as heck. Don’t the converters understand the limits of a public school education these days? They need to make everything more simple.
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Here’s the simple explaination.
If you have a 20KW generator it is almost a certainty you can run everything you can turn on in the house and still not exceed its capacity.
Forget what the amp gauges say.
When on shore power then you do have to do some power management.
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This again confirms the universal electric system tester in boats and buses is the wifes hair dryer.
That little hand held device has shut down more systems then can be counted. The look on Mary Ellen’s face was priceless when she was really good at it years ago.
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Putting a measuring guage in that is only accurate when you are powered from your inverters is simply dumb. This shouldn’t be a hard fix for anyone wanting their amp meter to read shore or generator load. The load while on inverter power should be displayed on the inverter’s remote.
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Agreed, Jon. The simple logic I need.
Gil, then why do you think they don’t do it?
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Because they did not consult Gil before they designed the coach, an obvious Liberty shortcoming.
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Karl,
I could only guess why they did this. A measuring device that does’t provide a meaningful reading is not a measuring device.
Maybe, we can take a look at what they did and correct it. I think I know what they did and it would be an easy fix. I’ll come down, if you want.
I bet they changed this at some point in their production.
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They did correct the readings to reflect actual. Someone that knows the specifics might be able to post the changes and when they were made.
I actually ignored my readings because over time on my coaches I knew a certain device drew 13 amps, another might draw 10 and yet another might require as much as 15. So what I found myself doing was ignoring the meter and just turning on the circuits that I knew would not exceed the limits and if some additional loads were required I would know which to turn off to prevent tripping the shore power. When I turned on the generator however I threw caution to the wind and became an energy hog.
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But you LIKE minutiae, Jon. I prefer not to refresh my calculus skills. Thank you.
Gil, would love to get together some time, even if it’s just to debate what can be done with this. I am pretty full until the is trip, then don’t get back until July, gone again in August. Other than that, I am pretty flexible! 😉
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The kohler 20k unit used has a 83 amp breaker on the generator from Kohler. Liberty then has a 70amp main breaker at their transfer relays that is protecting shore and gen power. As far as the load and amp reading goes, over the years with differant systems there has been some changes to the way the system is reading amp draw on the coach. The LED amp meters at the load center are reading the amp draw directly at the load center.
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Karl,
Send me an email when you have some time. I’m pretty flexible.
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