Doug Miller wrote:
In article , Metspitzer wrote:

2 amps of current might melt solder on those printed circuit cards you
use, but it would be negligible on 12-14 gauge wires that are used in
houses. It would take something like using a toaster oven and a Fry
daddy on the same circuit. That could bring the wire close to a
temperature that would melt solder. A short circuit (random fault)
would for sure. That is why the NEC requires splices to be
mechanically secure before using solder.

To quote your own words: "It is obvious ... you really don't understand what
is going on."

That is *not* why the NEC requires soldered splices to be mechanically secure
without the solder. The NEC requires that because solder lacks the strength
necessary to make a connection mechanically secure.

And the NEC requires splices to be "mechanically and *electrically*
secure without solder" before they are soldered. It is probably not
possible to make a splice mechanically secure without it being
electrically secure. The solder does not carry the full current. There
is very little solder that carries any current. There are a huge number
of soldered splices out there that have not been a problem for over 50
years. I have never seen a failed solder joint that was not defective
from the start. If soldered joints were getting even a fraction as hot
as claimed the insulation would be destroyed. The NEC allows solder to
be used because a properly soldered splice is reliable.

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