[PSUBS-MAILIST] data cable

[hank pronk via Personal_Submersibles]

 Alan, I love your mould, very niceHank
    On Monday, June 1, 2020, 2:18:59 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hank,the very first penetrator I made was in a linear actuator. ( I am sure I've said this before)I am not sure whether I stripped a section of the insulation or not,but presume I did. It went through 1" of epoxy. When I filled the linear actuator with WD40, it just ran out down the outsideof the wire insulation. No pressure. I couldn't believe it. I was using a good epoxy.I suppose not all insulation is the same & maybe another insulation would haveadhered better. But I haven't been very trusting since, & after Doug's videos,even less trusting. I now have a mold for pouring a marine polyurethane overeverything as a wire support, additional barrier & to make it look pretty.Also when I pour the epoxy in to the metal through hull I build a plastercine wallaround the top so I have a section of epoxy over the lip of the through hull tostop any extrusion of the epoxy in to it. This is so any repetitive extrusion overdiving cycles doesn't cause the epoxy to tear from the through hull & create a leak over time.Alan


On 2/06/2020, at 12:59 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:


 Alan, I have tested my penetrators with no additional glue or silicone.  I agree silicone or glue is a good idea but in testing I have discovered that it takes 1,000 psi before air will pass between the wire shield and up the wire.  I tested be screwing the penetrator into a pipe.  I pressurized the pipe interior with air not water.  I then place the pipe in a bucket of water to look for bubbles.  Not until 1,000 psi will very minor random air bubbles appear.  If the test was reversed with water in the pipe then I suspect it would take much more pressure to push water past.  Hank
    On Friday, May 29, 2020, 11:42:50 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Brian,I cover the insulation on the wires & the potting material with a PVC glueup to an inch from where it is potted. I use a 2 pot heat activated PVC gluethat will tear the PVC before it peals off.Reason for this is water can force down between the PVC & the potting material.Alan
On 30/05/2020, at 4:38 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:


Thanks,  or maybe just tin the wires with solder .  But I"ll look for solid .
Brian


--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] data cable
Date: Sat, 30 May 2020 01:24:15 +0000 (UTC)

 Brian, it the strands are solid core, you can strip off the insulation and then pot.  If the strands are multi wire then cut and sold in a section of solid wire to pot.Hank
    On Friday, May 29, 2020, 7:01:08 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi All,            What would be the best way for me to pot a cat5 ethernet cable?    Would the insulation need to be removed?  
Brian

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