[PSUBS-MAILIST] minn-kota cabling to hull

[Jon Wallace via Personal_Submersibles]

Alan,

The best approach is to use threaded rod with the potting, if possible.  
My question is probably better stated in the context of whether air 
trapped between a multi-wire cable and the surrounding sheath is an 
issue to be concerned about.  Some cables have a good tight sheath but 
others such as CAT-5 is pretty sloppy.

A potential concern of the blue globe gland since it seals around the 
cable sheath is what happens if the sheath gets damaged and cut 
underwater.  Water pressure will allow creep to flow between the wires 
and sheath bypassing the gland.  However the same would be true of a 
home-made potted penetrator as well.  What type of inflow should we 
expect from such a breach?  Minor?

Jon



On 4/16/2015 4:46 PM, Alan James via Personal_Submersibles wrote:
> Jon,
> I noted that the lights on "I think" a dual DW at Nuytco
> had oil in the wiring tubes to the lights, which were a clear plastic.
> I compensated a linear actuator & didn't strip the wires inside the 
> potting.
> I filled it with WD40, & it just ran out between the epoxy & the wires 
> when
> I tipped it upside down. No pressure applied.
> I think it was Hank that suggested untwisting the wires so the potting 
> mix
> can get around them. On the through hulls, Carsten & Emile are using
> blue globe cable glands with one outside the hull & another inside for
> double security.
> Alan
>
> ------------------------------------------------------------------------
> *From:* Jon Wallace via Personal_Submersibles 
> <personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion 
> <personal_submersibles at psubs.org>
> *Sent:* Friday, April 17, 2015 12:06 AM
> *Subject:* [PSUBS-MAILIST] minn-kota cabling to hull
>
>
> I think Emile had details of potting the minn-kota. Anyone know where
> this might be located?
>
> Anyone waterproofing their cabling by oil-compensation through a poly
> tube?  If I remember correctly, Aquarius uses this method for the
> electrical wires to the lights and vacuum.
>
> Jon
>
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