If this is a heating cable it implies a high current application.
That could make conductive epoxies problematical. 
A crimped connector that can then be soldered might be a better alternative.
You could consider a high Bismuth alloy which will shrink on cooling,
possibly in a tube arrangement. That will give a good mechanical clamp/grip
and a gas tight bond. This type of arrangement is used for optical fibre
bonding/sealing and in some magnetic applications. (Where the magnetic
material is not solderable).
Depends on how "long term reliable" you need to be.

Mike

 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl VanWormer
Sent: Thursday, March 27, 2014 8:28 PM
To: [log in to unmask]
Subject: [TN] electrical connection question

I'm trying to make a long-term reliable connection between some Copper wires
and some Silicone jacketed Carbon stranded heating cable.  An example of the
cable is at

http://www.alibaba.com/product-detail/Silicone-insulated-carbon-fiber-heatin
g-cable_863719692.html?s=p



Our customer is currently wrapping the Copper wire around the Carbon fibers,
and then applying solder to the Copper strands to enclose the "joint".  This
does not seem to promise a long-term reliable connection.  I am considering
some experiments with conductive epoxy and/or making some crimped tubes,
clamping the overlapping Copper and Carbon strands.



Is there any place I can find some "fatherly guidance" as I begin to explore
this territory?



Thanks,
Carl





Carl Van Wormer, P.E., AE7GD
Senior Hardware Engineer
Cipher Engineering LLC
    21195 NW Evergreen Pkwy Ste 209
    Hillsboro, OR  97124-7167
    503-617-7447x303
    [log in to unmask]<mailto:[log in to unmask]>
http://cipherengineering.com

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