Marine Electronics Forum

Shore power woes nicely explained

Old 06-03-2010, 12:35 AM
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Default Shore power woes nicely explained

just passing along some good info found from
Old 06-03-2010, 04:12 AM
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Very good info. I know, because I learned the hard and expensive way a few years ago.
Old 06-03-2010, 05:26 AM
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A quick read reveals some incorrect information although the proposed solutions are fine.

First, "Not every marina has GFIs.". A marina would not be expected to have GFCI protection on the power poles. This belongs on the boat.

Second, "Adding a galvanic isolator – essentially a resistor .......... ". A galvanic isolator is essentially a pair (or more) of diodes arranged to block low levels of DC current while allowing an AC fault to complete the circuit to ground and trip the breaker.

Any boat with installed shore power should have either a galvanic isolator or isolation transformer, technical errors aside.

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