They dont look or feel isolated, like ones inside a headphone cable
They’re called enameled cables, they’ve got a thin layer of insulation which prevents them from rusting or shorting.
To add, enameled wires are also used in motor windings and old CRT monitors (deflector windings). The easiest way to identify it is to scratch with a knife or burn a small portion of the wire to see if the enamel separates.
What does it look like when the enamal seperates vs a non-enameled wire?
Slightly brighter and shinier. The enamel gives it a slightly darker matte finish. More importantly though, the peeled/burned enamel looks different from copper.
I created an account just to answer this. They can short. We had a string of these, and it shorted and nearly caught the tinsel on fire. They weren’t man-handled, in fact we were extra-careful with them, because they were so thin and fragile-looking. These are dangerous. Do not use them.
The power supplies feeding these are typically .5A at 5v so they can’t draw more than ~2.5w. Is that really enough to generate sufficient heat to start a fire? Maybe if they are wrapped around something incredibly flammable?
Is that really enough to generate sufficient heat to start a fire?
In case of a short circuit, yes, more than sufficient
Yeah, those kinda puzzled me as well. They didn’t look like they’re varnished, but I suspect I could be wrong about that. After all, they do work, lol 😂.
“Never change something that works”
