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AuthorMessage
1narrowboa
1narrowboa

Posted: Thu Apr 14, 2011 4:56pm

Post Subject: Boat Inverter

Should the output earth be connected to the steel boat hull? Bob Dunkley.

Tony-B
Tony-B

Posted: Thu Apr 14, 2011 6:26pm

Post Subject: Boat Inverter

In general terms it is vital BUT it is not so straight forward. The reason this is important is because without a connection to the hull your "mains" RCD will not protect you. However the earth you are talking about should be a proper earth derived from the neutral output but not all inverters can run with such an earth and trying to make them can ruin the inverter. The best thing to do is to contact your supplier or the maker/dealer and get written assurances that the earth line on the inverter is a true neutral derived earth and if it is not is it safe to fit a bond between neutral and the hull. This is a complicated area with much misunderstanding and poor advice so take care. Tony Brooks

Tony-B
Tony-B

Posted: Thu Apr 14, 2011 9:57pm

Post Subject: Boat Inverter

The lack of info about your system caused me to give a less than satisfactory reply. What I said is true for inverters permanently wired to a "mains" circuit in the boat. If you are talking about a low wattage inverter with a socket into which you plug an appliance directly then an earth to the hull would not be of major importance BUT for maximum safety one would be ideal. FWIW my boat is like this an does not have a hull earth bond. Tony Brooks

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