50 amp female to a 30 amp male

[g36]

Source of the post Easiest, cheapest way to go...just buy a 30 amp cord, cut off the female end and replace it with a new 125v-50 amp female end. Done.

It would work but i dont think its cheaper or better. since there are 2 50amp inlets imo as above it would be cheaper to purchase bulk cable from ebay etc whatever length you meed purchased by the foot. to make up short adapters and use the heavy oem cords he already has.rather than buying 2 30 cords already made up and cutting ends. To each their own. He also needs to decide if hes going to run 3 16k ac's cause they're going to pull more than 30 amps on that cord guaranteed. 405s has all acs on power 2 .

[buster53]

I think the OP has already decided against the 3rd AC. Yes, buying bulk cable is cheaper, but I'm not a fan of using extension cords which you are doing by using the OEM cords and short adaptors cords. I prefer 2 connections, one on shore and one on the boat.

[g36]

I went through this whole thing when I bought this boat so I explored all the options. I have a 60 ft run to my pedestal. I have 2 50 ft cords oem. Maybe a adapter with another connection isn't ideal but making up 2 10ft with 2 new 6/3 cables with new ends has served me well. If the cable is sized correctly there will be no heavy draw and the extra connection shouldnt cause that much if any increased resistance. I experience no loss of voltage or current and have no heat with my setup. Imo for people with one and living in the heat Having a 405/406 it needs the 3 zones of ac that was one of first things I did is add one for the aftcabin. It doesnt need a 16k one but smaller . It was already set up in the breaker panel for it just wasn't added.

[buster53]

A 60' foot run is an awful long run. For that, yes, I would probably use the 2 cords as well. I think I only needed more than 30' once at another marina for one night.

[Midnightsun]

Wow, lots of juice, did not realize there were 2 50a inlets as I have only 1 albeit 250v. To supply this properly to its capacity would require no less than 4 30a plugs at the pedestal. Do keep in mind you cannot get more than 60a out of dual 30a connections if using 125v. In comparison, running a single 250v 50a does supply the equivalent power of dual 125v 50a connections. I can now see why the 125v 50a was discontinued. Great discussion, learn something new every day.

[g36]

agree very few (pretty much never) places have 50 125v service and like the op i did also run into some while travelling home with my boat upon purchase. it is nice when you dont have to worry about turning things off or running too much to throw a breaker. carver designed the 405 this way and it is what it is. i have had no issues using the dual 30 amp service thats supplied at my slip but there are times its pushing it and is a long run and the larger power cords take any concern out of this part 60 ft sounds like alot i agree but 42ft long slip 15 wide and some room for slack adds up. the power inlets on the boat are port aft by steps at swim platform and my power pedestal on the dock is forward and on starboard side of boat when pulled into slip. i dont back in the slip if i did it would be like 5 ft to the power. my marina doesnt allow any changes or moving of the power, wont even consider if you pay for it. which could be understandable i guess, so each of us are on their own. all this discussion goes away of course when the boat is on its genset cause the kohler 10e produces 83 amps, plenty of capacity for way more than will ever be used.

[Serendipity]

Okay so here is the latest. It does appear the system is 125/50 based on the pics.
My marina is great and doesn't care what I do since I am going to be in my slip year round.
Remember I have the boat on a reservoir that is 16 miles by 7 miles so it is land locked now with no more trips.
Connections from the boat to my shore power is about 5 or 6 ft so a very short distance. I am on a concrete and steel floating pier so I am told with a total of 30 slips.

I agree I dont want to swap out the connections on the boat side. Marina will let me do whatever I need to have ample power to the boat and I probably wouldn't go less than 10 or 12k on the 3rd a/c that is a total of at least 44kbtu to 48kbtu's. Will depend if I can get a deal on the 3rd 16k or not.

So what are your thoughts now?

[g36]

your land locked you said. so cord ends wont matter for you. so i would want to ask them what is the pedestal wire set up for? i would want 50 amp service if i can get it. can i put in 50 amp 125 volt service? yes its old but its still around. its going to match what you already have or does it have to be 250 v 50amp? which will they allow? if they dont care then matching what you have is going to be cheapest. y's and power cable ends can get expsensive and since its just for you then fix it for yourself. like i said before i can tell you you will be all over 30 amps running the 3 ac units at the same time. the boat needs 3 acs i do agree so you can bet power 2 needs all it can get and power side 1 will be high sometimes close to 30 depending whats running. if they will let you go with higher capacity over 30 for sure if not it can be done but youll have to be more mindful of what your using .

[buster53]

I agree that new cables, Y's, cable ends can get expensive. But what about putting in new service at the slip? What if the slip is 30-40-50 feet or more from a breaker box? You are going to have to run all new cable from the breaker box to the slip. That ain't going to be cheap. That's 2, 50 amp cables times whatever length you need plus 2 50 amp outlets.

Get a quote for new service before you do anything.
Also, get a quote on a new 16k AC unit installed.

[km1125]

You might want to rethink that 3rd AC unit. 48000 BTU's for that boat will be overkill. Nothing wrong with having a 3rd unit, but drop back to a 6k or 9k unit

Source of the post
As for a 3rd AC. I also think that would be overkill. I have a 9 an 11 and a 14 for a total of 34,000 btu. Apart from electrical draw there are other things to consider such as the increased water flow demand to address if you add to the existing system. Just food for thought.

Just remember, you guys are in VA and Montreal, the OP is in Mississippi. He's also trying to cool (or partially cool) the helm and the area under the hardtop. He might need 16k BTU more.

But I'd look at the genset capacity too, before I put another big unit in, and also figure out how I'm going to divide up the load on which panel so you don't overload one.