[PSUBS-MAILIST] elec thru hulls

Mon Jan 23 12:12:50 EST 2017

Brian,As a rule I use threaded rods for the reason I mentioned and what James mentioned.  I like to bolt the wires on but I see in your case that may be tricky with the ID of the hose being in the way.  I thread the fitting all the way to the shoulder to increase surface area for the epoxy.  I have not solderd wires on, I make my own crimps and shrink tube if I am not bolting.  That is because as a rule my thrusters are meant to be jettisoning, at least on Elementary.  Gamma has the escape pod so I am not as worried.  Also James makes the best point, epoxy can NOT handle heat AT all.   You might be able to bolt your wires on if your three penetrating rods are different lengths.  This way the connections are not in the same spot inside the hose, maybe?  It is pretty easy to make crimps, I just take a rod and drill the size to match the wire and the rod and slip on and crush.
Hank 

    On Monday, January 23, 2017 9:44 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Brian.  I would suggest threading for the reason Hank says, but also so you can screw on the wire connections with nuts and washers.  Soldering onto those thick copper rods is difficult and if you've potted them first, you risk breaking out the epoxy with the heat.  Or solder the wires to the rods before potting.  I didn't of course and had to break the whole lot out and start again.  In fact I think I must have made almost everything on my sub twice.  :)  
On 23 January 2017 at 15:53, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hank,  Do you put a proper thread through the entire length or just a cut that is not intended to have a threaded bolt go thru ? Brian

--- personal_submersibles at psubs. org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] elec thru hulls
Date: Mon, 23 Jan 2017 15:20:35 +0000 (UTC)

Brian,Those look very nice, and you will enjoy filling them with epoxy with such a big throat.  I have to use a syringe in some cases.  The only critique I could have is, I always thread the inside of my penetrators.  I have no idea if it matters, but my theory is, the water has a tougher journey to make going over threads and the epoxy has more surface area to grab.  Hank 

    On Monday, January 23, 2017 1:08 AM, Alan via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 Hi Brian,I am not an expert, but I use a small gas torch on the heavy stuff.  Just heat the rod & wire up well first. Hank or someone else with experiencemight want to comment, but I would wind the wire around the rod & solder it then cut back any excess wire sticking up after soldering.Alan

Sent from my iPad
On 23/01/2017, at 8:07 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

Hi Alan,       There is a larger diameter bore on the ocean side yes, goes from 1 5/32 down to 7/8" .   I'm going to run the wires thru a vinyl tube filled with oil .   I think I'm going to need a heavy duty soldering iron to solder the # 5 wire to the 3/16" solid rod however!  Not sure if my little iron is up to the job ! Brian

--- personal_submersibles at psubs. org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs. org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs. org>
Subject: Re: [PSUBS-MAILIST] elec thru hulls
Date: Mon, 23 Jan 2017 03:32:18 +0000 (UTC)

Very good Brian.Is there a step or cone shape in the seaward side of the through-hull tokey in the potting mix? Also how are you coating the wiring coming in tothe through-hull.Cheers Alan

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs. org>
 To: PSubs <personal_submersibles at psubs. org> 
 Sent: Monday, January 23, 2017 3:38 PM
 Subject: [PSUBS-MAILIST] elec thru hulls

Hi All,                Been working on my electrical thru hull penetrators.  I'm going to have three 3/16" copper conductors going through them.  I still need to pot the conductors in.  They are going through a 1 1/2"  aluminum disk which is exactly the same size as my acrylic viewport . Here's a pic: Cheers, Brian
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