I believe the isolator will be a 'black box' in the power circuit (closest to 
the shore power connector on the boat).  The one I have is labeled.

-----Original Message-----
>From: James Henderson <[EMAIL PROTECTED]>
>Sent: May 23, 2007 3:29 PM
>To: [email protected]
>Subject: Re: catalina27-talk: GFCI?
>
>Jim,
>How would I know if the previous owner of my boat put in a galvanic isolator 
>or diodes in the ground
>line? What should I look for? I am not a master electrician...not even 
>close!
>
>J
>
>
>>From: [EMAIL PROTECTED]
>>Reply-To: [email protected]
>>To: [email protected]
>>Subject: Re: catalina27-talk: GFCI?
>>Date: Wed, 23 May 2007 10:22:46 -0700
>>
>>Jim,
>>    If the circuit is the way you describe it, you are correct in that each
>>receptacle would need to be GFIC.  If each receptacle has  wires run to a
>>common tie point, and from there to the fuse/ circuit breaker then your
>>configuration looks sort of like a star and you need a GFIC on each one.
>>On the other hand, if the wires go from one receptacle to another, then
>>you only need a GFIC on the receptacle closest to the fuse/breaker.
>>    If the dock receptacle has a GFIC, this would protect your boat's
>>receptacles, unless you have a galvanic isolator or diodes in the ground
>>line.  As I'm sure you know, these are to prevent galvanic corrosion from
>>stray currents, but I think they can also block the some of the leakage
>>current in the ground line which would cause the GFIC to trip.
>>     GFIC testers are not expensive <$5-15> at Home Depot or on eBay, and
>>using one to check the function of both your boat and home's GFIC is cheap
>>insurance.
>>
>>Jim, "Tequila Chica"
>>Dana Point, CA
>>
>>
>>
>>
>>"Sailor Chef" <[EMAIL PROTECTED]>
>>Sent by: [email protected]
>>05/23/2007 09:37 AM
>>Please respond to
>>[email protected]
>>
>>
>>To
>><[email protected]>
>>cc
>>
>>Subject
>>Re: catalina27-talk: GFCI?
>>
>>
>>
>>
>>
>>
>>I can't speak to your individual outlets but around here the dock outlets
>>are GFCI. If that is the case, I would think you would not need individual
>>GFCI outlets.
>>Mark
>>Want to keep your WHOLE PAYCHECK?
>>PLEASE VISIT http://www.fairtax.org
>>----- Original Message -----
>>From: "James Henderson" <[EMAIL PROTECTED]>
>>To: <[email protected]>
>>Sent: Wednesday, May 23, 2007 10:04 AM
>>Subject: catalina27-talk: GFCI?
>>
>>
>>While tinkering with my outlets last night, and trying to install a GFCI
>>outlet, I noticed that none of the 110v outlets seemed to be wired in the
>>same circuit and would thus each need to be changed to a GFCI. Am I
>>correct?
>>As it is, my boat has no GFCI installed at all. Thanks!
>>
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>>
>>
>>
>
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