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solid wire in PGID terminals

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raymondj(at)frontiernet.n
Guest

Posted: Fri Jul 13, 2012 5:01 pm Post subject: solid wire in PGID terminals

Turns out I'm misinformed again.  The pgid terminal specs in the Digikey 

specify SOLID OR STRANDED wire.



The only possible defense of my error I can find is that some larger 

crimp on lugs (starting at #8 wire) specify that they are for stranded 

wire, although they don't specifically prohibit solid wire.



Thanks again for helping me get things right.



Raymond Julian

Kettle River, MN.



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine

On 07/13/2012 06:42 PM, Robert L. Nuckolls, III wrote:

 	  Quote: 	
		   At 03:22 PM 7/13/2012, you wrote:

> 

>

> Bob,

>

> I noticed that crimp-on terminals were used on the solid leads on the

> diode.  It was my understanding that using crimp-ons on solid wire was

> not recommended.  Am I misinformed....again? 



    Is that something I wrote? If it was, I cannot recall

    a context where that would be true. Here's a photomicrograph

    I just shot for 22AWG solid wire (diode lead) crimped into a

    red PIDG using an el-cheapo crimp tool.



 Emacs!



    I couldn't find my polishing disk so the smoothed end is

    rather rough. Normally you'd be able to see the ring of

    tin plating on the wire at the interface between wire

    and terminal barrel. Nonetheless, this photo confirms that

    the two metals to be joined have been upset with sufficient

    force to make them essentially one with no voids.



    Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jul 14, 2012 6:54 am Post subject: solid wire in PGID terminals

At 07:58 PM 7/13/2012, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: rayj <raymondj(at)frontiernet.net>



 Turns out I'm misinformed again.  The pgid terminal specs in the Digikey specify SOLID OR STRANDED wire.



 The only possible defense of my error I can find is that some larger crimp on lugs (starting at #8 wire) specify that they are for stranded wire, although they don't specifically prohibit solid wire.



 Thanks again for helping me get things right. 	




   Looking though the AMP literature, they DO make

   a distinction between terminal types for solid

   vs. stranded wire. 



   



   We can see that AMP offers a 'specialized' product

   tailored to single-strand wire. Adding a degree

   of 'roughness' to the inside surface of the wire

   grip increases tensile strength of the joint (of

   negligible concern in aircraft wiring) and an

   increase in electrical contact area. This last

   benefit is also a tiny percentage increase. Since

   we don't even begin to load wires in airplanes

   like they do in ground based vehicles, this too

   would be a no-big-deal benefit. This is not intended

   to detract from the engineering that goes into

   AMP products . . . at the same time, I deduce that

   it's not significant to the task of wiring a diode

   to the outside of a contactor.



   

 

   Bob . . .    [quote][b]

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