50amp 125/250 shore power receptacle

It can be done and I've seen it done before. How many amps are you pulling off of each 125volt line?

Have you checked the price of one 50 amp power cord vs 2x 30 amp cords?

it is a common upgrade on your boat to have a Glendening (I bet I spelled that wrong)

or you can buy a three way that has 2 female 50A 125v and one male 50A 250v.

With the above three way you will have 50A (110v) on your A panel and 50A (110v) on your B panel.

I believe that you boat only has 110 appliances and fixtures.

Your A side is the house power, and your B side is your AC, electric heat, battery charger, block heaters, central vac.........

You will get all the power you need for your boat with the above three way.

The three way with 2 50A/125v females and one male 30A will work for some things.

The 30A cord is only going to give you 30A at 110v to feed your A and B.
The 50A/250v male with the two 50/125v females will give you 2 50A/125v feeds for your A and B.

that is a big difference in juice for a boat like yours.

I sometimes use the 30A cord if im only plugged in for a short stop and im going to conserve power on the panel.
Sometimes for a short stop the 30A cord is a lot easier to handle than the 50A cord.

I had the same set up on my 1981 Post 42. Like RT46 suggested above - I used a twin 50a 125v to single 50a 250v splitter at the inlets on the boat, with a 50a 250v cord to the dock. Worked great.

This (above) does sounds more solid, reliable and safer. 120vac @ 50amp service is getting rare to find on the docks.

If I read your original post, your taking two house inlets of 50 amp, 120vac each, down to 30amp leads AND THEN reducing again to a single 30amp power cord? 50amp twice supplied by a single 30amp cord? Does your power cord glow in the dark?

Like SaeEric suggested above, A single 240/50 amp main cord to a 50amp "Y" at the service inlet should work fine and safely.

I think you can safely use a 30A shore power cord with a proper adapter as long as you do not use more than 30A on the boat.

I often visit places with no 50A service and have to use a 30A cord or adapter.

With the Post in the OP and 2 50A/125v inlets on the boat, you can plug each into different 30A to help spread the load over the A and B sides.

There are two places on the south shore of Long Island that I know of that still have 50A/125v. Watch Hill and Sailors Haven on Fire Island are two places that still have the 50A/125v.

I don't recommend trying to use a 30A cord to supply a 50A boat from 50A shore power

I looked at a 50 amp cord about a week ago at West.
Almost $ 800.00

Hehehe, the ends are about $100 each, the boots are $30 each.......in that cord.....if you think that's expensive, look at the price of a 100amp cord.

You know, I looked at the 100 amp cord of a yacht in Annapolis last year while gawking.
The pin & sleeve male connector alone must be worth a small fortune !
The cord is heavey enough to hurt someone.

The Yachts were Belle Una ( Sp? ) and DREAMER.