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Crimping Question

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ogdenk

Joined: 05 Feb 2007
Posts: 41
Location: Syracuse, NY

Posted: Wed Jan 16, 2013 6:30 am Post subject: Crimping Question

Hi All, 

I am building an RV-10 and getting to the point where I need to think about electrical components and systems.  I have a question about crimped connections:  Is it a good (or bad) idea to put some electrical grease on the wire and/or connector before making the crimp?  I have found that this helps the trailer light connections in my vehicle to survive the road salt over the winter, but that is a completely different environment.  Any thoughts/comments appreciated. 

More questions to follow as I move forward . . . 

Kent Ogden 

RV-10 #40710  [quote][b]

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stein(at)steinair.com
Guest

Posted: Wed Jan 16, 2013 6:53 am Post subject: Crimping Question

Hi Kent,

On airplanes there is no need to do that extra step (in fact it could create some un-wanted gremlins later on).  Just do a good job crimping and you’ll be fine.  A solid crimp will be excellent and will be as good as any other type of connection.

Just my 2 cents as usual!

Cheers,

 

Stein 



 

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Kent Ogden

Sent: Wednesday, January 16, 2013 8:29 AM

To: aeroelectric-list(at)matronics.com

Subject: Crimping Question

 

Hi All, 

I am building an RV-10 and getting to the point where I need to think about electrical components and systems.  I have a question about crimped connections:  Is it a good (or bad) idea to put some electrical grease on the wire and/or connector before making the crimp?  I have found that this helps the trailer light connections in my vehicle to survive the road salt over the winter, but that is a completely different environment.  Any thoughts/comments appreciated. 

More questions to follow as I move forward . . . 

Kent Ogden 

RV-10 #40710 	  Quote: 	
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  [quote][b]

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Mauledriver(at)nc.rr.com
Guest

Posted: Wed Jan 16, 2013 7:04 am Post subject: Crimping Question

I'm not an authority here but I'd like       to compare my answer to others so here goes; it's unnecessary and       therefore may just complicate your work.  The crimping specs and       procedures don't require dielectric grease to perform as designed       so don't bother.

       

       Doing the electrical and panel work on mine was probably the most       satisfying part of my build.  Partly because it required some       design and integration work that wasn't "CNC'd and pre-drilled".        Partly because it was fun to learn the right ways to do things       like crimping and wire bundling after having hacked away at       various trailer harnesses, auto wiring and even some certified       glider wiring (whoops!).

       

       You have all the resources you need between Vans plans and these       lists... Enjoy!

       

       Bill "missing the build but enjoying the '10" Watson

       

       On 1/16/2013 9:29 AM, Kent Ogden wrote:

     

     [quote]                     

Hi All,              

I am building an RV-10 and getting to the point where I need to         think about electrical components and systems.  I have a         question about crimped connections:  Is it a good (or bad) idea         to put some electrical grease on the wire and/or connector         before making the crimp?  I have found that this helps the         trailer light connections in my vehicle to survive the road salt         over the winter, but that is a completely different         environment.  Any thoughts/comments appreciated.              

More questions to follow as I move forward . . .              

Kent Ogden              

RV-10 #40710        	  Quote: 	
		  



	
     [b]

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Tim Olson

Joined: 25 Jan 2007
Posts: 2878

Posted: Wed Jan 16, 2013 7:31 am Post subject: Crimping Question

One big difference between trailers and planes is the quality of the wire. If you use airplane wiring on your trailer, you probably wouldn't have much problems with your trailer either. Not to mention the goldplated contacts on many aircraft parts.

Tim



On Jan 16, 2013, at 9:04 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:



[quote]                   I'm not an authority here but I'd like       to compare my answer to others so here goes; it's unnecessary and       therefore may just complicate your work.  The crimping specs and       procedures don't require dielectric grease to perform as designed       so don't bother.

       

       Doing the electrical and panel work on mine was probably the most       satisfying part of my build.  Partly because it required some       design and integration work that wasn't "CNC'd and pre-drilled".        Partly because it was fun to learn the right ways to do things       like crimping and wire bundling after having hacked away at       various trailer harnesses, auto wiring and even some certified       glider wiring (whoops!).

       

       You have all the resources you need between Vans plans and these       lists... Enjoy!

       

       Bill "missing the build but enjoying the '10" Watson

       

       On 1/16/2013 9:29 AM, Kent Ogden wrote:

     

      	  Quote: 	
		                       

Hi All,              

I am building an RV-10 and getting to the point where I need to         think about electrical components and systems.  I have a         question about crimped connections:  Is it a good (or bad) idea         to put some electrical grease on the wire and/or connector         before making the crimp?  I have found that this helps the         trailer light connections in my vehicle to survive the road salt         over the winter, but that is a completely different         environment.  Any thoughts/comments appreciated.              

More questions to follow as I move forward . . .              

Kent Ogden              

RV-10 #40710        	  Quote: 	
		  



	
     



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[b]

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Thu Jan 17, 2013 6:21 am Post subject: Re: Grease or no grease

I'd go with using grease used sparingly and selectively.



Grease keeps out all sort of environmental contaminants. What seems wrong about this is that grease certainly is an insulator, but so is any space that it fills, and filling up any empty spaces with grease prevents water, air and nervous sweat from getting in there.



In electronics, thermally conductive grease serves the same purpose but adds high thermal conductivity to the joint. The caveat "thin layer" always appears in the instructions, since a thick layer reduces both the thermal and electrical properties. 



I heard a story of one particularly brilliant electronic engineer who finished each prototype with a dollop of grease in the corner of the box. He said if a loose piece of solder or cut wire showed up, that's where it would wind up.



But yeah, grease attracts dirt too, so use sparingly.

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

ogdenk

Joined: 05 Feb 2007
Posts: 41
Location: Syracuse, NY

Posted: Fri Jan 18, 2013 6:11 am Post subject: Crimping Question

Thanks for all the responses on the dielectric grease question.  I guess I will ponder it a bit more, but I probably won't use it on connectors that will be hard to get to in the future or are in a protected area.  I was initially thinking about the stall warning switch in the wing leading edge (I did install it, I believe not everyone does).  If you were in the clouds or light rain, I'm sure moisture will enter the notch in the leading edge and probably soak the switch/connectors.  There's an access plate though, so if there's a problem it's easy to get to.  I will have AOA as well so this shouldn't be a critical component to lose. 

  

 For really nasty environments like on my trailer, I also coat any butt splices with this stuff:  http://www.starbrite.com/sproductdetail.cfm?ID=1076

 This stuff is great at sealing a connection, also says it's fire resistant so maybe safe to use in a plane.  It's kind of like a thin RTV when you put it on without the RTV smell.  Dries pretty hard but still a little flexible.  My trailer lights used to give me fits because the mounting studs were also the ground connection to the frame, and when they rusted it was lights out.  After installing new lights and coating the studs with this stuff the problems were all cured.

  

 Kent Ogden

 RV-10 #40710

  

 



 	  Quote: 	
		  >> "Eric M. Jones" <emjones(at)charter.net> 1/17/2013 9:21 AM >>>

--> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net>
	




I'd go with using grease used sparingly and selectively.



Grease keeps out all sort of environmental contaminants. What seems wrong about this is that grease certainly is an insulator, but so is any space that it fills, and filling up any empty spaces with grease prevents water, air and nervous sweat from getting in there.



In electronics, thermally conductive grease serves the same purpose but adds high thermal conductivity to the joint. The caveat "thin layer" always appears in the instructions, since a thick layer reduces both the thermal and electrical properties.



I heard a story of one particularly brilliant electronic engineer who finished each prototype with a dollop of grease in the corner of the box. He said if a loose piece of solder or cut wire showed up, that's where it would wind up.



But yeah, grease attracts dirt too, so use sparingly.



--------

Eric M. Jones

www.PerihelionDesign.com

113 Brentwood Drive

Southbridge, MA 01550

(508) 764-2072

emjones(at)charter.net





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JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Fri Jan 18, 2013 8:06 am Post subject: Crimping Question

Hi Kent

  

 

 What I think you need is ACF-50 anti corrosion  spray - fantastic stuff, I've seen a TV coated with this, and placed in a fish  tank - TV still worked

  

 

 John



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