On Aug 28, 5:55*pm, bud-- wrote:
The village idiot still hasn’t figured out what *his* source says "In
the design of twist-on wire connectors THE PURPOSE OF THE SPRING IS TO
MAINTAIN TENSION ON THE SPLICED WIRES, NOT TO CONDUCT ELECTRICITY ITSELF."

Wire nuts without that metallic spring also hold wires in place. But
wire nuts with springs conduct current - make the junction more
conductive - redundancy. As the citation shows, if that spring has
insufficient numbers of turns - cannot conduct sufficient current -
then a wire nut may get hot; even catch fire.

If Bud was honest, then Bud would also recommend wire nuts with no
metallic spring. If honest, Bud should oppose springs as too dangerous
and unnecessary. Bud's only purpose is to post insults. Bud is a
professional spin doctor - a classic troll - who even posts sales
promotions rather than honest technical facts. OP will obtain little
useful information from Bud.

Properly installed wires are first twisted together to always
conduct sufficient current without a wire nut. Then a wire nut is
attached to make that connection even more conductive. A redundant
connection so that the junction is always fully conductive and does
not get hot.