Originally Posted by MonkeyBiz
Looking to go from the 50a shore power cord to two 30a inlets on the boat in order to run AC and other items. Is this a typical setup for a boat with AC? I'm guessing I will have to be careful not to run too many things at once due to the amperage draw of both lines?
The options are typically 30am or 50 amp circuits. It is far more common to see multiple 30 amp, rather than a single 50amp. Many shorepower circuits on the dock are only 30amp. The manufacturers commonly places the AC on one circuit and the house on the other circuits on boats these size. Placing everything on one circuit would require a 50amp and would present challeges at many marinas.
Splitting a 30amp shoreconnection to 2 x 30amp connections with a Y-splitter is going to potentially limit what you can run concurrently. It is very doable, as I do it all the time. However, don't expect to run everything AND cycle the AC and fridge compressors at the exact same time. Otherwise go wtih 2 x 30 amp cords.