[Public-List] Deck Penetration for Mast Wires

Jonathan Bresler 262alberg30 at gmail.com
Tue Mar 10 05:50:47 PDT 2020 

Thank you all for the examples and suggestions for mast wiring penetrations.
Have not decided yet which way to go, u-bend pipe vs cable clams.
One consideration is that I and my crew have been know to step on the
current
wiring which has old cable clams at deck level.  Stepping on the wiring
cannot
be good and over time will damage the wiring if not break a wire.  The
existing
VHF cable, which will be replaced, is bent down hard at a 90 degree angle.
The insulation between the center conductor and the sheath must be horribly
mangled in there.  So much for 50 ohm characteristic impedance at that
point.

Having a terminal block in the head seems to be the consensus.   Will
install
one there.

Have wondered why the wiring runs along the port side of the boat in the
cabin.
To get from the port side, the wires run into the port sail locker and then
into the
engine space in order to hit the electrical panel from below.  All this
hullabaloo is
due to the upright icebox being in the way.   Wonder why Whitby did not
decide
to run the wiring on the starboard side.

Jonathan

On Tue, Mar 10, 2020 at 7:13 AM Mike Lehman via Public-List <
public-list at lists.alberg30.org> wrote:

> Probably the Coast Gaurd guy that was the previous owner.
>
> On Tue, Mar 10, 2020, 1:14 AM Clay Pass via Public-List <
> public-list at lists.alberg30.org> wrote:
>
> > It looks like someone may have fabricated this themselves from some SS
> > tubing and two 90deg elbows welded to form the 180 degree turn.  It has a
> > deck plate welded to the base that is screwed into the deck and then the
> > pipe protrudes all the way through and flush to the ceiling on the
> inside.
> > It doesn't look like there is a fastener on the inside it is just caulked
> > all the way around, so it may just be held by the 4 screws on the
> outside.
> > There is no manufacturer mark on it anywhere.
> >
> > Clay Pass
> > #449 Seeing Deep
> >
> > On Sun, Mar 8, 2020 at 10:11 PM George Dinwiddie via Public-List <
> > public-list at lists.alberg30.org> wrote:
> >
> > > Clay,
> > >
> > > Your photos are posted on
> > > http://alberg30.org/maintenance/disorganized/mast_wiring/
> > >
> > > Can you tell us some more details about the stainless steel pipe
> through
> > > the deck?
> > >
> > >   - George
> > >
> > > On 3/8/20 5:48 PM, George Dinwiddie via Public-List wrote:
> > > > Clay, the list strips attachments to avoid spreading computer
> viruses.
> > > > If you'd like to send the photos directly to me, I'll put them on the
> > > > website.
> > > >
> > > >   - George
> > > >
> > > > On 3/8/20 3:57 PM, Clay Pass via Public-List wrote:
> > > >> Here are two other pictures of where it enters the interior...
> > > >>
> > > >> Clay
> > > >>
> > > >> On Sun, Mar 8, 2020 at 3:50 PM Clay Pass <clay.q.pass at gmail.com>
> > wrote:
> > > >>
> > > >>> This is what I use on #449.  Enters next to bulkhead above head to
> a
> > > >>> junction box near the cabinet.  Then the cabinets make a nice way
> to
> > > >>> route
> > > >>> cables hidden from view to other parts of the boat.  No sealant is
> > > >>> needed
> > > >>> in the pipe which allows for quick disconnect.  The pipe is
> stainless
> > > >>> steel
> > > >>> and I've never had any water penetration.
> > > >>>
> > > >>> Clay Pass
> > > >>> #449 Seeing Deep
> > > >>>
> > > >>> On Thu, Mar 5, 2020 at 12:44 PM Jonathan Bresler via Public-List <
> > > >>> public-list at lists.alberg30.org> wrote:
> > > >>>
> > > >>>> Folks,
> > > >>>>
> > > >>>> Thinking of redoing the deck penetrations for the mast wires on
> > > >>>> Constance.
> > > >>>> Currently there are three distinct penetrations, two to port of
> the
> > > >>>> mast
> > > >>>> base
> > > >>>> and one to starboard. All enter the v-berth just forward of the
> mast
> > > >>>> beam.
> > > >>>> The wires get stepped on from time to time. They are not well
> > > protected
> > > >>>> from
> > > >>>> damage.   The wires are: electrical cable for steaming, deck,
> anchor
> > > >>>> lights
> > > >>>> and ground, VHF cable, signal cables (16 or 18 AWG) for Raymarine
> > ST60
> > > >>>> wind instruments.
> > > >>>>
> > > >>>> Thinking about having a single penetration, just aft the base
> plate,
> > > >>>> entering
> > > >>>> into the head/hanging locker area. One penetration large enough to
> > > hold
> > > >>>> all
> > > >>>> the wires.  Would fill the penetration with putty or expanding
> foam
> > or
> > > >>>> "what
> > > >>>> woud you recommend".  Playing with the idea of perhaps a 3/4"
> > thruhull
> > > >>>> topped
> > > >>>> by a 90 degree elbow so that water does not pool/sit on the top of
> > the
> > > >>>> opening.
> > > >>>> One of these (
> > > >>>>
> > > >>>>
> > >
> >
> https://www.groco.net/products/fittings/pipe-to-hose-elbows/ffc-series-npt-full-flow
> > > >>>>
> > > >>>> )
> > > >>>> might do the trick, but does seem a bit bulky.
> > > >>>>
> > > >>>> Thank you,
> > > >>>> Jonathan
> > > >>>> --
> > > >>>> Jonathan M Bresler
> > > >>>> S/V Constance Alberg 30 #262
> > > >>>> Annapolis/Eastport MD
> > > >>>> _______________________________________________
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> > > >>>>
> > > >>>
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> > > >
> > >
> > > --
> > >
>  ----------------------------------------------------------------------
> > >    When I remember bygone days                         George Dinwiddie
> > >    I think how evening follows morn;
> gdinwiddie at alberg30.org
> > >    So many I loved were not yet dead,
> http://www.Alberg30.org
> > >    So many I love were not yet born.                          also see:
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> http://idiacomputing.com
> > >
>  ----------------------------------------------------------------------
> > >
> > >
> > >
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-- 
Jonathan M Bresler
S/V Constance Alberg 30 #262
Annapolis/Eastport MD

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