On Aug 28, 11:37 am, bud-- wrote:
From elsewhere in the same series:
"17. The characteristic heating in a band around the connector shows us
where the heat is being generated. In all of those failures shown, from
both lab and homes, the heat is generated by current flowing in the
connector spring. Here, all of the current is passing from wire-to-wire
through sections of the steel spring."

To argue and insult, Bud always posts half facts. Wire nuts with
too few turns in that spring can heat. Wire nuts that must make up
for the bad wire connected (wires not twisted) must carry more current
and will get hot. Wire nut must be sufficient to carry the current
AND wires must be twisted so they can carry the current. Only then
does a superb connection exist.

That paragraph is irrelevant to Bud. He will do what he always does
- apparently an inferiority complex. He will post again only to
argue.

Best solution (standard workmanship) is to twist all wires together
so that the twist along is a sufficient connection. Then the wire nut
is applied to make another sufficient connection. No wire nut,
properly installed, should get hot - the connection should be that
good. A copper wire nut connection should be installed as is
necessary for aluminum wires. Those who actually know reality need
not post mockery and insult.