240V Shore Power?


jetmart

jetmart

Member
I am looking at a 2012 and the build sheet shows the following under Standard features:
240Vshorepower w/fail-safe galvanic isolator & 50-amp cord w/Glendinning motorized extend/retract andstorage system •

Is the shore power required supply 240 volt and not 120 volt?

 
The 45 Yachts come with 240 volt 50 amp power with an automatic cord retractor. 50 amp 250 volt receptacle is needed at the dock.
The boat will transform 240 to 120 internally. Most of the equipment like the a/c and other big power items will be 240 volt, the outlets and small stuff will still be 120. Don't let this scare you as this power is necessary to run the boat.
Hope this helps.
 
Thank you, that's what I though however didn't know that marinas had 240V. Is that common in the US?
I will have to check if my marina has it.
 
My marina doesn't have 240 volt and no one I asked knows of any. I have seen 45' in our marina and other with 110V only running A/C and etc. Any chance that they have both 110V for running limited systems and 240V for running everything? Anyone with a 45' that wants to chime in.
 
Thanks gsent, good catch, I grabbed the wrong one. Best think is contact Marinco and they will advise on what they have to fit the needs
 
Glad you posted again, got to thinking about this again. Gsent was right about the cord, but I'm still off on the amperage. The code will supply 240V but will only be at 30 amps on each 120V line (240V 30amp). So you will be 20 amp shy on each leg. It will work so long as you watch how many things are on at one time
 
Alldodge,
You are correct, the 30 amp plugs will have overcurrent protection for only 30 amps.
 
The availability of 240V/50A power at the docks is also an issue at many places we travel too. It's not just an issue with using your smart Y and 2 30A plugs on the dock. Sometimes a 2nd 30A connection is just not available or in some cases I've seen the entire dock is wired with just 120VAC so even with a smart Y none of the receptacles have the other phase necessary to get 240V. I am also looking at a 45 Yacht as my next boat and recently read that the cockpit A/C would only work with 240V but didn't mention the 2 cabin A/C units. Many other manufacturers that have 50A power usually seem to have all systems on the boat operate on 120V and it's only the A/C units that are 240V or maybe hot water or cooktop. I have also seen some with isolation transformers that will only work if 240V is available. In these cases nothing on the boat works, not even the 120V devices.
Could any owners of the 45 Yacht clarify what would work if only a single 120V/30A dockside receptacle was available and a 50A to 30A adapter was used. What systems are 240V only in this model. I'm looking for a 2007 model as well as I would prefer shafts over IPS.
 
That's a basic power question. If you only have 30A 120V you cannot get 240V, don't know of anyone that makes a 120V Y to 240 and if it was made it would be down to 15A or less.

Was talking to my sister and she has 50A 240V power for her 52 foot Jefferson, it has 4 A/C units, no wonder it needs 240V power. She has it up for sale in Louisville and is a fresh water boat
 
Still looking for an owner of a 45 Yacht who can confirm specifically which items would not work if only 1 30A shore power outlet was available and a 30A to 50A adapter was used. I'm aware that a smart Y going from 50A to 2 30A will provided they are on the opposite phase, but this is not always available. I am currently looking for a 45 Yacht. I currently have a Cruisers Yachts and even all their models are not the same. On some all works with the appropriate adapter except all A/C units, in others nothing works. I did find one bit of info that stated the only devices on the 45 and 48 that need 240V power was the cockpit A/C unit and the cockpit electric BBQ. Maybe someone else could confirm this. I could live without the cockpit A/C and BBQ for a night while traveling but am really hoping the cabin A/C works. I'm looking at a 2007 45 yacht.
 
your best bet is to call the Formula Owners technical support desk at the factory. they'll answer your question.

AFAIK everything on the boat, even the AC, is 120V, as every device is on one leg or the other of the 240V feed... there are no dual breakers like you'd see in a house for AC or a water heater, for example. You could validate this by looking at the specs printed on the side of one of the units.

50Amp 240V is really also 2x 50Amp 120V, all 1 phase. If it were 3 phase, then devices using both hot legs would be 208V, not 240V.
 
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