[PSUBS-MAILIST] Sonar thru hull wiring

[Alan via Personal_Submersibles]

Brian,
I remember discussing this in a previous thread, & Sean endorsing Alec's
method of connecting the shield with a wire in the through hull.
Perhaps you could find out from the manufacturer what shielded cable they use. 
Both Emile & Carsten are using Blue globe cable glands, but not sure whether
they are using them on shielded cable. They put one Blue globe outside the hull & another inside. I remember Emile testing a cable in a blue globe to 3000psi before the
cable started extruding through.
Alan


> On 23/06/2019, at 1:05 AM, Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alec, that's how I ran my prior transducers, but ...
> 
> As I haven't yet cut through the wiring I don't know for sure, but I suspect it's more than the usual two, hence the question. I'm debating attempting the simplest approach: tie a tight knot in the cable and run it through a 90° elbow, the part facing out being at least 1/2" larger than the thru hull.  I have an extra 1/4" NPT I could use.  Plug the narrow end with epoxy, and top the large end with 2 part hard rubber.  I know Mark does this with his subs, but he dives shallower than I'll be going.
> 
> Hmm ... or maybe a gland tightened around the cable, same deal as above, but embedded the gland base in the 2 part hard rubber. Or maybe a stainless cap tapped for the gland base, and fill with hard rubber from the other end. I used to make canister dive light heads that way, using turned down D cell mag light heads with LED replacement bulbs. Hmm ...
> 
> I can shorten internally and splice correctly.
> 
> Reflections?
> 
> Brian
> 
> 
> 
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