In article ,
(Jack Erbes) wrote:

tinning stranded bare
copper wires before crimping a terminal on is a bad thing to do

I have been told that it acts as a stress raiser at the point where the
tinning ends, and with vibration this can cause a fatigue fracture of the
wire at that point.

I think best practice is to use tinned copper wire (all the strands
individually tinned during manufacture), with a mechanical only crimp
covered by a short length of adhesive-lined heatshrink tubing.

In the UK, these people: http://www.power-store.com/products/mcw/index.htm
have an interesting range. The stuff they sell is the US-made Ancor range.

It's an expensive way of doing things but should last very well and be
reliable.

Regards,

Jerry Jones

Remove the obvious from my address to reply