T-Pain Is On A Boat: Re: [Electric Boats] Grounding an electric conversion in fresh water

Sunday, August 3, 2014

Re: [Electric Boats] Grounding an electric conversion in fresh water

Quick question, Were you standing in water or wet when you
came in contact with the wiring? Not likely one should forget
to ground the ac system. Isolated ground is not connected to
the common insulated ground wire ( the white one).

On Friday, August 01, 2014 04:21:45 PM you wrote:
> Not true.
> Isolation transformers are supposed to be used on boats -
which negates
> the matter.
>
> Partly true however -- .. if 2 things go wrong at once, an
ungrounded
> boat may be a danger.
> Every single electrical installation in the world is also
dangerous, is
> 2 things go wrong at once.
> This cannot be protected for with grounding.
>
> Water itself is not particularly dangerous .. nor is 120VAC, nor
240 V ac.
> A live 240 line is not actually physically dangerous to people,
in general.
> GFIs, required everywhere, will safely trip before harm can
come to
> people (30 ms is typical).
> I have had 240 VAC shocks many times (maybe 7), one of
which was my own
> fault.
> None was more than unpleasant.
>
> You mentioned "great risk" with 120VAC. This implies
imminent, common,
> deadly harm, and I dont think so, not with 120VAC.
>
> Medium power, ie 480V 3-phase and substation transfer lines
at 20.000 V
> and up, are a totally different manner.
> None are commonly installed near boats.
>
> Hollywood and media portraials of electricity simply dont
work that way
> with common, low power, 240V.
> Note we are referring to *accepted and legal practices*
according to
> ABYC and worldwide installation codes.
>
> On 01/08/2014 16:04, Chris Hudson clh5_98@yahoo.com
[electricboats] wrote:
> > Considering you are in fresh water you are putting people
at great
> > risk with your 120VAC ground left floating at the dock. If
for some
> > reason you lose your ground connection to the dock, any
person could
> > become that connection in the event of a fault.
> >
> > Chris
> >
> > Sent from myPhone