Originally Posted by
CapitalRecovery
Even in Power supplies, right?
Yes.
Scrape any suspect wire with a sharp blade and you will be able to see a redish color(you can also use some fine sandpaper etc).
You will learn that much of the stranded wire has a "silver" color to it but is copper. The outside silver color is what is called "tinned" wire. The "tinned" makes soldering much quicker, better, faster especially for automated machines. That's why the entire wire is tinned so that no matter what length of wire is being used by a manufacturer the wire is tinned and ready to solder.
If you want to understand more about why you should tin wire prior to soldering do a search on youtube. Mike
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