In article .net, HorneTD wrote:

[snip]

(B) Splices. Conductors shall be spliced or joined with splicing devices
identified for the use or by brazing, welding, or soldering with a
fusible metal or alloy. Soldered splices shall first be spliced or
joined so as to be mechanically and electrically secure without solder
and then be soldered.

See that ? "Mechanically and electrically secure without solder." That means
that the connection may not depend on the solder.