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Old 02-14-2020, 11:55 AM   #15
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350 ft x's 3 #2 ga copper wire. Pluse #10 Ground. Why do you need to be powered 24/7 @ a full 50 amps?

install a large propane tank and put the fridge and WH on GAS. Install a small electric service, 30 amp (smaller wire) to run your converter for battery charge and lights.

2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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Old 02-14-2020, 03:25 PM   #16
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Saying an outlet is 50 amp doesn't tell me anything about the voltage. Of course, the common AC voltage in the US is 110 or 220 VAC (or 120/240 VAC to some people).

When talking about 220 VAC, there are 2 legs of 110 VAC creating the 220 VAC. A typical residential clothes dryer uses a 30 amp, 220 VAC three prong plug. Typically, the dryer doesn't have any components that use 220 VAC. Each of the two legs of 30 amp, 110 VAC are used to power different components. An example, one 30 amp, 110 VAC leg will power the tub motor and the other 30 amp, 110 VAC, the heating coil.


My household dryer uses the more modern 4 wire plug. I believe that started in 1996.

It has 240 volt heater coils, very common.

Why would they need 1 leg of 30 amps @120 volts to rotate the drum ?

Some RVs use 120 volt dryers but don't have 240 volts run to them.

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Old 02-14-2020, 03:36 PM   #17
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If all you're worried about is keeping the fridge cold and charging the batteries any 2000 watt inverter generator will do that on ECO mode. You don't "need" an inverter generator, but they are quieter and will use less fuel when lightly loaded.
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Old 02-14-2020, 04:16 PM   #18
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No one so far has mentioned that if you use a generator for your sole power source, you will be doing oil changes every few days.....

A gas generator might need an oil change every 50 hours.

A big diesel that has an oil filter, will still need changes every 250 hours or sooner.
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Old 02-14-2020, 04:48 PM   #19
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Some good advice above. Some bad advice. A lot of irrelevant advice.

Assumption 1: Everything in your 5th works the way you want it when plugged into a 50 amp 240 volt RV outlet.
Assumption 2: Your 5th has a good inverter/charger and can run everything you need including the refer.

Info from your post: You want to run a refrig 24/7 to keep food frozen or cold.

Needed information: Is this a storage location or are you intending to live full time in the 5th? I think you suggest you want to live in it full time or for long periods.

If it is a storage location and you want to just keep the refer cold, a generator is going to be a special problem. A small generator running 4 hours a day and 14 hours once per week would work with a modest battery bank to do the job.

This of course requires frequent visits add fuel and start and stop the generator. A better solution is grid power because it works reliably without frequent attendance and does not require periodic maintenance.

If you are going to live long term in the 5th and you are frugal with power consumption, the same small generator and battery bank would work. I assume you will be there everyday to manage the generator.

If you want everything to work including the air conditioners, you will need a much bigger generator and will need to run it full time or nearly full time. (50 amps at 240 volts = 4000 watt generator.) Most portable generators are not up to the full time running gig. Many whole home standby generators are also not up to full time year round running. So you would need a 4000 watt gen that is rated to run full time for long periods. Generally these are not available at big box and hardware stores.

Again, grid power provides uncomplicated reliable power. In the long run, grid power is the best solution for full time year round power.

Don't worry about the issue of damaging electronics with the wrong kind of generator. That issue has to do with battery powered inverters. Some battery powered inverters are not good for electronics.

I wish you good luck and happy trails ahead.
Paul Bristol
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Old 02-14-2020, 05:42 PM   #20
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Originally Posted by twinboat View Post
My household dryer uses the more modern 4 wire plug. I believe that started in 1996.

It has 240 volt heater coils, very common.

Why would they need 1 leg of 30 amps @120 volts to rotate the drum ?

Some RVs use 120 volt dryers but don't have 240 volts run to them.
The residential dryer example was not about how a dryer is made but a simple explanation of how the two legs of 220 VAC can be "split" to use two 110 VAC circuits.

My post was about a trailer that has a 220 VAC, 50 amp receptacle and how the 220 VAC, 50 amps is "split" in the breaker box to two 110 VAC 50 amp buses delivering a total of 100 amps, 110 VAC.

A trailer with a 30 amp, 120 VAC receptacle has one leg with 30 amps at 110 VAC for a total of 3300 watts.

A trailer with a 50 amp, 220 VAC receptacle has two 50 amps at 110 VAC for a total of 11000 watts.

Both only have 110 VAC available on the load side of the breaker box. The 50 amp service has 220 VAC on the line side of the breaker box and the 30 amp service has 110 VAC.

Carl and Janis, without Zoey, our 17 year old Boston Terrier (2001 - 2018)
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5th wheel, generator

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