Martec folder destroyed by neighbor's electrical problem - SailNet Community

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  #1  
Old 05-25-2013
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Martec folder destroyed by neighbor's electrical problem

Story is there was a problem with the neighbor's inverter. Running gear on his boat and those to either side of him damaged. This is my client's prop:





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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

Was your client's boat also plugged into shore power, or was it "ungrounded"?
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

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Originally Posted by SlowButSteady View Post
Was your client's boat also plugged into shore power, or was it "ungrounded"?
Plugged in.
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

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Originally Posted by Fstbttms View Post
Plugged in.
Thought so. I keep my boat unplugged and use a solar panel to trickle charge the batteries for fear of just this sort of a problem (not to mention the more general danger of having an unattended 120V/30A circuit surrounded by saltwater). I still occasionally use the shore power, but only when I'm on the boat.
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Last edited by SlowButSteady; 05-25-2013 at 12:18 PM. Reason: Can't have chrisncate freaking out over typos
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

Wow! That prop is done! I am guessing they had no zinc? How long did it take for the prop to get that bad? It didn't happen over night!
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

This will give you an idea of how much metal has actually been lost:

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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

Wow. I wondered while someone filed a grove in the side but that is the hole for the cotter pin.
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

Would a galvanic isolator on your customer's boat have saved the prop?

I noticed that my zincs weren't lasting as long as I'd expect, so I added one.

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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

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Would a galvanic isolator on your customer's boat have saved the prop?
Dunno. This is a pretty extreme situation.
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Old 05-25-2013
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Re: Martec folder destroyed by neighbor's electrical problem

isolators keep your boat from being some one else's ground if they are putting current into the water
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