50 amp female to 30 amp male shore power cord question

you'll have 30-amps to play with, all A/C appliances will work but only 30-amps worth at a time.

30a is 3600 watts, 50 amp is 12,000 watts.

Two air conditioners will be marginal and allow about nothing else if it even works. Fridge and water on propane and give your battery an hour+ to fully charge first. Otherwise yes all items are available for use to the limit of 3600 watts. For near continuous use it is best to limit to 24 amps (80%).

You ran on 30 amp before no difference now, manage your power usage.

Everything will work but you won't have as much power (amps) to play with. Turn too many things on at the same time and the breaker feeding the barn will trip.

JimInMich wrote:
Or does it all power up and I just cant use both A/C's?

That pretty well sums it up. With a 30 amp supply you get one leg at 30 amps or 3,600 watts of power. With a 50 amp supply you get two legs at 50 amps or 12,000 watts of power. With a 30 to 50 dogbone, both 50 amp legs in the MH will have power but will have to split the 30 amps or 3,600 watts.

The RV ADAPTER has the two hot leads shorted together as shown in this diagram...



DMBRUSS Images

Both 50A ZONES in your RV will get power but you only have a 30AMP capacity where if you was actually hooked up to a RV 50A service you would have a 100AMP Capacity.

So you will be be at the mercy of only having a total of 30AMPS to use before tripping the breaker...

Hope the diagram helps...

Roy Ken

Basically it means you can only run one roof air conditioner at a time. Every thing else is the same.

Is it not possible to run a second 120v line (different phase), from your service panel to that 30 amp receptacle on your pole barn, then install a regular 50-amp receptacle?
I predict you will not be happy in the long run "managing" 30 amps for a 50-amp MH. Also I predict you will get tired of changing that 30 amp breaker due to it becoming weak from frequent tripping.

parkmanaa wrote:
Is it not possible to run a second 120v line (different phase), from your service panel to that 30 amp receptacle on your pole barn, then install a regular 50-amp receptacle?
I predict you will not be happy in the long run "managing" 30 amps for a 50-amp MH. Also I predict you will get tired of changing that 30 amp breaker due to it becoming weak from frequent tripping.

On contrare 30 amps is plenty much unless your living in it in summer while trying to run two roof AC units and other stuff to boot
so no you don't need 50 unless(like I said)

JimInMich wrote:
I've had lots of TT with 30 amp shore power cords, so I naturally have a 30 amp RV box on the side of my pole barn. Now I'm brand new to a Class A and it's 50 amp cord. I just ordered a dog bone adapter to convert the 50 to a 30, but what I'm wondering is, do I lose half of my MH power? Or does it all power up and I just cant use both A/C's?

No you won't lose half of your MH power the entire coach should have power you just have less to work with. 30 amp is plenty for storage or even staying in as long as you know what everything in the coach requires power wise. If you were at a CG with a 50 amp hook up & you tested with a milti meter the two hots would make 240 volts. After you plug your adapter into your 30 amp outlet the two hots on the four pin end will only be 120 volts.