> For me, I would butt splice them, and then put water proof heat shrink tu=
bing
> over each connection.  Why? Splicing is easy to repair, I don't prefer to
> solder wire to wire unless its just for a test.  It seems you end up melt=
ing
> more insulation and still question  if the solder was completely bonding =
to all
> the wires.

The best way of doing this is to use what is sometimes termed a 'Jenkins Sp=
ring' - and I don't know the origin of the term or why it is called a sprin=
g.

The two wires to be joined have bare untinned wires laid side by side and a=
 strand of suitable gauge wire is would around them to bind them together p=
hysically. Then solder is flowed into the joint to make a good joint. The j=
oint is reliant on the strand of wire holding the two wires in firm physica=
l contact before soldering.

> I think last time around someone mentioned there was a mil-spec or aircra=
ft
> spec that said to use mechanical splices.

I am used to the ESA space soldering requirements, but these are essentiall=
y (initially) derived from NASA and US military requirements. Crimping and =
soldering (as described above) are both allowed.

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