Heat Shrink Tubeing and connectors

Calhere

Petty Officer 2nd Class
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Jun 17, 2008
Messages
123
Ok so by no means am I an electrician or do I claim to be but I want to learn, so I've wired up my whole boat but here is my problem the connectors keep coming off the wires (I used the right size that's the first thing I checked.) Also I bough Heat Shrink Tubing for the 16 Gauge wire I am using but it wont fit over the connectors any ideas on what I am doing wrong?
 

mthieme

Captain
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Oct 6, 2007
Messages
3,270
Re: Heat Shrink Tubeing and connectors

First, if you are using the correct size connectors and the wires are popping out, you are either not crimping them in the correct location or not with the incorrect pressure. Too little and the wire will pop out, too much at it could sever the wire and it will pop out.
You need to correct this before going to the next step. Shrink wrap is meant to seal the connection, not hold it. If you do not have a good connection to begin with, the shrink wrap will only hide a problem.
You need will need to use a larger diameter shrink wrap to go over the connector. It will shrink down over the wire even though it is larger.
 

Calhere

Petty Officer 2nd Class
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Jun 17, 2008
Messages
123
Re: Heat Shrink Tubeing and connectors

Ok so with the shrink tubes I need to go with the size for the connectors not the size for the wires.

As far as the connectors I'm not severing them as they are still intact and the pliers I'm using wont tighten it any tighter... Do I have to use those wire crimmpers that are kind of pricey or is there another alternative?
 

Rocky_Road

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Oct 8, 2008
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1,798
Re: Heat Shrink Tubeing and connectors

Shrink tube is not normally used, in conjuction with crimped wire connectors.

A good plan is to solder the connection...slide the shrink tube over the soldered wire (after it has cooled for a few minutes)...and 'shrink' the tube.

Any decent marine store has heat shrink crimp connectors, that seal the crimped connection AFTER you crimp the wires. To use these properly, you have to have a decent electrician's crimping tool...bite the bullet, and get a good one. It will become the favorite tool, in your boat's toolbox!
 

HONKER1

Petty Officer 1st Class
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Apr 1, 2007
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Re: Heat Shrink Tubeing and connectors

I may be missing something here, but I usually slight the adhesive lined heat shrink tubing on the wire before I crimp the connector on. Then heat with a heat gun.
 

jlinder

Lieutenant Junior Grade
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Jul 5, 2004
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1,086
Re: Heat Shrink Tubeing and connectors

The connectors are held on by a good crimp on the connector. You should be able to give a really strong pull on the wire and it will hold solid in the connector.

Heat shrink should be sized to fit over the end of the connector. You slide it over and down the wire before crimping the connector. After crimping the connector slide it up over the connector and heat. That way you get a good seal.

As stated, heat shrink is a sealer only. The connection has to exist on it's own first, and be solid, or get ready to be stranded.
 

Calhere

Petty Officer 2nd Class
Joined
Jun 17, 2008
Messages
123
Re: Heat Shrink Tubeing and connectors

Sure,
I get a lot of my terminals from them. No problems.

While you're there, here's really handy stripper that's a little easier to use that the all-in-one tool...
www.harborfreight.com/cpi/photos/36900-36999/36901.gif

Oddly enough I use my strippers from my Networking tool box. I have several Pair of crimpers but they are for phone jacks and Cat 5 cable so cant use them for electrical work :(
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,569
Re: Heat Shrink Tubeing and connectors

Agreed that a proper crimp is the first step. Without that, trouble is sure to follow. If you already have high-quality crimpers for coax and/or cat-5, you may find that they have interchangeable dies. If so, a set of dies for your 16 AWG should be available to fit your crimper handles.

We usually slide the shrink tube down the wire before doing the termination, and heat it afterward. Although, there are times I forget to put it on first, or the wire is too short (like in a panel) to put the tubing on first, so since the good Ancor brand tubing is at least 3-to-1 shrink ratio, it's still possible to go up a size and slide the tubing over the finished termination. I recommend the tubing that has an adhesive liner as well.

Soldering is frowned upon in the marine environment. Supposedly it creates a hard spot, that is later subject to fracturing due to vibration. That is true in aircraft for sure.. I suspect that in reality, 50% of the amateurs who solder boat wiring do a poor job, which ends up being worse than a decent crimp. Crimping -- good crimping -- is the method that is approved by ABYC. That said, there are a lot of good solder terminations on my boat. If done well, in a properly strain-relieved setup, and covered with good heat shrink, they are just about bulletproof, though, as I mentioned, not ABYC-approved.
 

Calhere

Petty Officer 2nd Class
Joined
Jun 17, 2008
Messages
123
Re: Heat Shrink Tubeing and connectors

Agreed that a proper crimp is the first step. Without that, trouble is sure to follow. If you already have high-quality crimpers for coax and/or cat-5, you may find that they have interchangeable dies. If so, a set of dies for your 16 AWG should be available to fit your crimper handles.

We usually slide the shrink tube down the wire before doing the termination, and heat it afterward. Although, there are times I forget to put it on first, or the wire is too short (like in a panel) to put the tubing on first, so since the good Ancor brand tubing is at least 3-to-1 shrink ratio, it's still possible to go up a size and slide the tubing over the finished termination. I recommend the tubing that has an adhesive liner as well.

Soldering is frowned upon in the marine environment. Supposedly it creates a hard spot, that is later subject to fracturing due to vibration. That is true in aircraft for sure.. I suspect that in reality, 50% of the amateurs who solder boat wiring do a poor job, which ends up being worse than a decent crimp. Crimping -- good crimping -- is the method that is approved by ABYC. That said, there are a lot of good solder terminations on my boat. If done well, in a properly strain-relieved setup, and covered with good heat shrink, they are just about bulletproof, though, as I mentioned, not ABYC-approved.

Thanks, Let me get my crimpers and see if I can change the die they are really good ones so maybe I can. That would be awesome.
 

Calhere

Petty Officer 2nd Class
Joined
Jun 17, 2008
Messages
123
Re: Heat Shrink Tubeing and connectors

Thanks, Let me get my crimpers and see if I can change the die they are really good ones so maybe I can. That would be awesome.

Yup appears that I can but they do not make one for electrical wiring.
 

a70eliminator

Captain
Joined
Sep 9, 2007
Messages
3,762
Re: Heat Shrink Tubeing and connectors

I work in the field of hvac and do alot of crimp splices, I had one of them crimper/stripers/cutters/ and my boss took an threw it in the trash dumpster just before presenting me with a professional crimp tool, one designed for the specific task, what a difference a good makes, the crimps we use are of high quality stainless steel too so a good tool is a must have, also in case you don't already know, you have to position the crimp so the crimp happens right on the seem, with a high quality tool, the halves will kinda roll under themselves, those entry level combination crimp plier tools don't work all that well.
 

Rocky_Road

Lieutenant Commander
Joined
Oct 8, 2008
Messages
1,798
Re: Heat Shrink Tubeing and connectors

I work in the field of hvac and do alot of crimp splices, I had one of them crimper/stripers/cutters/ and my boss took an threw it in the trash dumpster just before presenting me with a professional crimp tool, one designed for the specific task, what a difference a good makes, the crimps we use are of high quality stainless steel too so a good tool is a must have, also in case you don't already know, you have to position the crimp so the crimp happens right on the seem, with a high quality tool, the halves will kinda roll under themselves, those entry level combination crimp plier tools don't work all that well.

Have you got the brand name of your tool?

Maybe a picture?

Got to like the stainless steel construction...!
 

Rocky_Road

Lieutenant Commander
Joined
Oct 8, 2008
Messages
1,798
Re: Heat Shrink Tubeing and connectors

The pliers are made by klien or klein (spell) I'll find a photo somewhere and post, and the crimps themselves are stainless (for outdoor rooftop units) not the pliers themselves. Once you use one of these you'll never want to use anything else.

http://www.twacomm.com/catalog/model_1005.htm?sid=40F0135B6326281836D3F7F9957A5A64

Much obliged!

I am pretty sure that my Home Depot has a Klein tool section (in the electrical department)...heading there today.

Now...where do I find the SS crimps? My guess is that the heat shrinking crimps at Boaters World are probably SS....
 

Shizzy

Ensign
Joined
Aug 5, 2007
Messages
984
Re: Heat Shrink Tubeing and connectors

The pliers are made by klien or klein (spell) I'll find a photo somewhere and post, and the crimps themselves are stainless (for outdoor rooftop units) not the pliers themselves. Once you use one of these you'll never want to use anything else.

http://www.twacomm.com/catalog/model_1005.htm?sid=40F0135B6326281836D3F7F9957A5A64

X2 !!!

I have always felt it a good investment to spend an extra dollar or two for the better tool.

A few years back I was putting a new set of cut to fit plug wires on my Old Cutlass and a friend stopped over with his quality plug wire stripper and crimper. If not for that tool it would have taken me 3 times as long and Im sure I would have had miss fire issues.
 

Calhere

Petty Officer 2nd Class
Joined
Jun 17, 2008
Messages
123
Re: Heat Shrink Tubeing and connectors

Aha - pliers.
$2.99 isn't expensive. Sure beats being towed on the water.
Go here...
www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92410

Sure,
I get a lot of my terminals from them. No problems.

While you're there, here's really handy stripper that's a little easier to use that the all-in-one tool...
www.harborfreight.com/cpi/photos/36900-36999/36901.gif

Mithieme I am gonna tell my wife it is your fault! You told me to go to the store I'm band from for the exact reason she is gonna be mad at me for.

I went for

Terminals
Crimper

I bought

Crimper
Terminal
Marine Heat Shrink Tube set (42 piece)
Multi Meter
Compression tester
Battery Terminal Cleaner
Wire Brushes
C Claps (on sale a buck a peice) x10
5 Gal Air compressor 1 3/4 HP (on sale for 99)
Lathe (on sale for 199.99)
 

Rocky_Road

Lieutenant Commander
Joined
Oct 8, 2008
Messages
1,798
Re: Heat Shrink Tubeing and connectors

Mithieme I am gonna tell my wife it is your fault! You told me to go to the store I'm band from for the exact reason she is gonna be mad at me for.

I went for

Terminals
Crimper

I bought

Crimper
Terminal
Marine Heat Shrink Tube set (42 piece)
Multi Meter
Compression tester
Battery Terminal Cleaner
Wire Brushes
C Claps (on sale a buck a peice) x10
5 Gal Air compressor 1 3/4 HP (on sale for 99)
Lathe (on sale for 199.99)

You get an A+, for passing the blame!

You aren't, by any chance, in politics...are you???
 
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