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Old 03-21-2018, 01:40 PM   #4
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,785
You will get a lot of advice on your questions. I am not sure how you separate fact from, well opinion. So with that said, here is mine:

You have an electrical system that can be used with US or European power supply. Your two 50A single phase inputs combine to make one 100A single phase output. This is somewhat unsafe because if you disconnect one 50A cord and the other is still connected to shore powe,r the female terminals in the open receptacle will be hot.

If you never need more than 50A of shore power and most boats your size don't, then you can remove one of the 50A receptacles. Also replace the 100A breaker with a 50A.

There is no neutral because that is what European power does. Your 240V ciruit doesn't need a neutral and the transformer creates the neutral for the 120V circuits.

The 100A service supplies the single phase (ie no neutral) 240V AC buss which is probably only used for air conditioning and maybe the water heater, neither of which need a neutral. It also supplies the transformer which provides two legs of 120V and a neutral. The transformer then supplies typical two phase 120V busses on the 120V panel. European power systems don't produce 120V and the transformer creates it for US appliances just like a travel transformer does.

If you want to hook up to European shore power systems, you just have to change the shorepower inlet receptical. All else should work fine on that single phase 240V power.

David
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