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Adding-on to 110v shore power system.
On Fri, 24 Nov 2006 21:43:55 -0500, "mortond"
wrote: Hi, Sorry, I guess I wasn't as clear as I thought! The marina only has a 50 amp receptacle. I wanted to avoid the cost of buying a second 30 amp or a single 50 amp isolation transformer. Basically, I wnted to hook-up the convection oven and fridge to the 50 amp shore power receptacle, like an extension cord, except, the extension cord would be routed via a 30amp breaker on the boat (revised that from a 50 amp) to one leg of the 'Y' branch of the shore power cord. The appliance grounds would not be connected to the boat at all. I assume the shore power ground would be isolated from the boat by the existing isolation transformer on one leg of the "Y" and because there is no boat connection on the other "Y" leg. Thanks for the interest. David David Either do it right - 1 or 2 isolation transformers, or do it wrong as above. Any system design must consider how it handles any fault condition not just the run-time conditions. The above scenario is a no-no. Just sketch your circuit, think about what wires are ground referenced and apply some faults. (Shorts to hull etc). Tip. - The hull going live or people dying should force a rethink! Richard Nb "Pound Eater" Parkend G+S |
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