Re: [Amel Yacht Owners] illustration of the Galvanic Isolator Installation


Alexandre Uster von Baar
 

Hello Franscisco,

What a terrible story… I would have been petrified…

Just as I was reading your previous post, I wanted to say I would have preferred changing the cable until the 230 volt box in the engine room, but definitely a difficult job, on the other hand it is correct the section is protected.

If you have the 2nd (little thicker) cable like this one
http://nikimat.com/galvanic_isolator/shore_power_tracing_3.jpg
then this is the 110 Volt cable

Meaning you also have that box
http://nikimat.com/galvanic_isolator/shore_power_tracing_19.jpg

And the big transformer:
http://nikimat.com/galvanic_isolator/shore_power_tracing_27.jpg

Thanks for sharing your scary story…
Alexandre



--------------------------------------------

On Wed, 8/17/16, svperegrinus@yahoo.com [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

Subject: Re: [Amel Yacht Owners] illustration of the Galvanic Isolator Installation
To: amelyachtowners@yahoogroups.com
Date: Wednesday, August 17, 2016, 9:16 AM


 









Hello Alexandre,
According to the electrician, the
cable failed due to old age in the marine environment.
 
I had previously
noticed the cable got warm when under load.  On this
particularly hot day when the cable failed, we had arrived
back into dock about 30 minutes before, after being out at
anchor for two days or so, and so the boat was charging
batteries, plus we had three air conditioners on.  We had
all hatches closed, including the
companionway.
Our
neighbour was cleaning his boat when he saw our cable in
flames.  He shouted "fire," "fire," and
ran for an extinguisher.  We heard his cries and rushed
into the cockpit.  I saw the end of the
episode:
The cable was flat on a dock
surface, and it was spewing out fire and sparks
perpendicularly to its length  with a flame length of 3
feet (1 metre) or more.
Then just as I was thinking
of running to the dock breaker, the fire fizzled on its own
just as the neighbour arrived with a large fire extinguisher
in his hand.  By this time, all power to the boat was
already off.
I wanted the
electrician to replace all the power cable including to the
230V box in the engine room, and he looked into it, but
reported to me that it looked very difficult or impossible.
 He said that besides, the section of the cable enclosed
inside the boat, being immobile, dry and shaded, wasn't
likely to fail.  In any event, hull
No. 350 had an unused pigtail right next to the failed
cable, by the propane locker: apparently, a whole second
cable, perhaps to be used in 110V installations?  As this
unused cable was found to have continuity/end at the 230V
box anyway, the new cable connects into the formerly unused
cable, and the end of the originally used cable was left in
a pigtail in its stead.
Cheers,
PeregrinusSM2K
N. 350At anchor,
Sardinia










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