They dont look or feel isolated, like ones inside a headphone cable
this post was submitted on 22 Dec 2023
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In case of a short circuit, yes, more than sufficient
Counterintuitively, a short circuit doesn't generate any heat. That is, because a resistance of 0 ohms generates 0V voltage drop. 0V * any amperage is still 0W. What generates heat is a resistance >0 ohms, i.e. not a short circuit. In an actual short circuit situation, that will be the case at many other places in series, i.e. connection joints, the inner resistance of the power supply etc..
So if you want to maximise heat output at a specific spot, you actually need to calculate your resistance at that point such, that one one hand it is low enough to allow for sufficient current, but at the same time high enough to generate sufficient voltage drop. If all series resistances are known, that is a common exercise in beginners electronics education ;)