By the time your wire reaches 200⁰ needed for your solder to melt, your insulation would already be burning. That’s not a plausible scenario, or you need to deliberately make a bad solder joint, cutting half the strands in the wire so it overheats in that particular place.
And even if it is permanent, AC wiring can heat up and mess with solder, so crimping or lever nuts are preferred.
By the time your wire reaches 200⁰ needed for your solder to melt, your insulation would already be burning. That’s not a plausible scenario, or you need to deliberately make a bad solder joint, cutting half the strands in the wire so it overheats in that particular place.
No, this is not true. Solder is brittle and any poor joint can cause a lot of heat. You should never use solder in household wiring.
Crimps, screw terminals, or properly rated electrical connectors only.