Bootlace Ferrule

1. Yes, use ferrules for stranded wire. https://hackaday.com/2018/04/12/to-ferrule-or-not-to-ferrule/
2. Does not apply to solid wire.
3. Ferrules provide the advanatage of solid wire with stranded wire. Stranded wire is flexible. Solid wire is stiff but usable directly in screw terminals
4. Stranded wire should not be soldered prior to crimping the ferrules on