Notices

Terminal connection sealing example

Old 12-18-2003, 10:47 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Diamond Bar, Ca.
Posts: 209
Default Terminal connection sealing example

I’m doing a negative accessory bus on a wet transom and thought I’d do a blow by blow of one way to make a reasonably watertight connection.

First I start off with uninsulated tin plated copper lugs with brazed barrels. Strip just enough wire then crimp with the male end of the crimp dimpling the bottom of the barrel (opposite the brazed seam).

http://www.momentoffame.com/snapshot...ame/l63195.jpg

Next I solder the ring end of the lug. The goal here is to seal the end and flow solder maybe 1/8” into the end of the conductor but not all the way past the barrel. If solder flows past the barrel and into the wire proper, I snip it off and try again, You don’t want to have a solid (soldered)/flexible conductor interface--that point is very prone to failure. Remove the flux with your potion of choice.

http://www.momentoffame.com/snapshot...ame/l63196.jpg

Next step is to put a few drops of your favorite dielectric/protectant right at the end of the insulation. I buy LPS3 by the gallon and put some in a little squeeze bottle so I can drip it onto the conductors. Let it sit for an hour or so while the solvents evaporate leaving a protective goo on the conductors which (hopefully) will prevent water from wicking up. Now give it a good clean with your solvent of choice—denatured alcohol works well on LPS3.


Slide a piece of ¼” dual wall shrink tubing over the ring end (do it BEFORE if the ring is a big one DOH!). Before shrinking, I like to put a dab of FC5200 on the ring end of the terminal. As the tubing shrinks, some 5200 will ooze out onto the ring. Lightly wipe it off and let sit 24 hours. It’s real important to let it sit a day because even the fast cure version of 5200 takes 24 hours to set up.

http://www.momentoffame.com/snapshot...ame/l63197.jpg

Now smear silicone dielectric grease all over the ring, screw and bus. Screw in the rascal then put a little more grease over the finished product. Should last a whole season before another coat of goo needs to be applied, and the connection should last nearly the life of the boat.

Kman

PS Will someone please tell me how to imbed a picture.
Kman is offline  
Old 12-18-2003, 11:35 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Gulf Breeze, FL
Posts: 2,406
Default Terminal connection sealing example

I've got a better way...don't place the bus on a wet transon...there are plenty of dry spots on just about every boat out there.

BTW, to imbed the images, I think you have to be a captain's club member. If not, you do it like this:

[ img ] http://www. website. com /picture . jpg [ / img ]

Remove all the spaces to make it work.

Harry

Harry Brosofsky is offline  
Old 12-19-2003, 06:20 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Feb 2001
Location: West Virginia
Posts: 3,877
Default Terminal connection sealing example

Kurt,

We do it exactly the same way, with one exception that is so minor (or at least I have been thinking that it is) that it might not be worth mentioning other than that I know you make your living this way. The difference is that I will to ahead and install them while the shrink fit is still warm. I don't let them set a day first figuring that the will cure just as well mounted as they will on my table, and maybe a little better actually because whatever slight bend is in the wire will be there as the sealer sets.

Now here is the odd thing - I wrote up a little blurb about how to do this for folks who were unfamiliar with it. Its posted on some web space I have but for reasons I won't go into right now I have difficulity getting to it (dam ISP's) but the text is very similar, the steps are identical, and the pictures are close to being the same except that I used a smaller example (some copper terminal on 14 guage wire or something like that).

Great minds, and all that ......

Thom

A Wise Man Once Said: "That's EXACTLY why I try NOT to read manuals, I start trying all sorts of stupid things and wasting all sorts of time when I read manuals. Half the time I try doing things just because I read some retarded blurb about it in the manual fully realizing I would NEVER use such a thing, but because the manual stated it could do it, I have to try it!!!"
Thom is offline  
Old 12-19-2003, 06:32 AM
  #4  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: May 2002
Location: Skaneateles, New York
Posts: 5,483
Default Terminal connection sealing example

Thanks. You have to be a member of the 'Captains Club' to post PICs...we'll worth the price; one time $25.00 special going on right now. Welcome aboard again; love that detail.

Boston Whaler, "MUMBLER", 24' Outrage, twin 175 HP Evinrude Ocean Pros. Snowball, the cat...
Mumblerone is offline  
Old 12-19-2003, 08:05 AM
  #5  
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Diamond Bar, Ca.
Posts: 209
Default Terminal connection sealing example

quote:Originally posted by Thom:
The difference is that I will to ahead and install them while the shrink fit is still warm. I don't let them set a day first figuring that the will cure just as well


Forgot to mention that the last thing I do is reheat the wire ends of all the finished (and connected) conductors to "set" their bends.

I'll do a post on how to make battery cables w/90 deg bends in that monster triple wall shrink tubing someday.

Kman
Kman is offline  
Old 12-19-2003, 08:07 AM
  #6  
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Diamond Bar, Ca.
Posts: 209
Default Terminal connection sealing example

quote:Originally posted by Harry Brosofsky:
I've got a better way...don't place the bus on a wet transon...there are plenty of dry spots on just about every boat out there.

Hey there. This one is just plain wet, and it's above the deck! The LPS-3 that I coat the bus with has a 2,000 hour salt spray rating. Just for schnizits and giggles, I ground a part of my trailer down to bare metal and put this PLS-3 on it. Three months and a half dozen saltwater dunkings later it's still as shiny as day one.

Kurt

*
Kman is offline  
Old 12-19-2003, 08:40 AM
  #7  
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Diamond Bar, Ca.
Posts: 209
Default Terminal connection sealing example

Woops! Forgot to mention the importance of restraining the wire near the bus. Hooters are great when they're flopping about, wires are not. The less flexing the better. Here is an example of larger cable that is restrained. Spend the money and get the stainless steel clamps. The nylon ones only last so long when under a load.

Kman is offline  
Old 12-19-2003, 01:47 PM
  #8  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Jan 2002
Location: Goldsboro, NC, USA
Posts: 2,264
Default Terminal connection sealing example

Kman

Nice quality work! Where can I find that clear heat shrink tubing?
silverg is offline  
Old 12-19-2003, 08:50 PM
  #9  
Senior MemberCaptains Club Member Admiral's Club Member
THT sponsor
 
Join Date: May 2002
Location: Brookhaven, LI, NY
Posts: 15,755
Default Terminal connection sealing example

Yeah, that's what I would like to know, where do ya get clear shrink wrapping tubing?

Birdman, Capt of

Scout Abaco 280 Click here!
Birdman is offline  
Old 12-19-2003, 09:11 PM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Gulf Breeze, FL
Posts: 2,406
Default Terminal connection sealing example

Kman,

My post was mainly tongue in cheek.

Harry

Harry Brosofsky is offline  
Old 12-21-2003, 07:32 PM
  #11  
Senior MemberCaptains Club Member
 
Join Date: Jun 2002
Location: 42-05, 70-38
Posts: 120
Default Terminal connection sealing example

All kinds of shrink tube here:
http://www.mcmaster.com/

C-Ya Out There!

Frank/Fourtunate
halfseas is offline  
Old 12-22-2003, 05:18 AM
  #12  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Jan 2002
Location: Goldsboro, NC, USA
Posts: 2,264
Default Terminal connection sealing example

halfseas, Thanks!
silverg is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread