Quote:
Originally Posted by sjspry
The copper would likely be fine. It is multi-stranded to prevent fractures or breaks from affecting the conductivity. What I would be worried about, though, is the inductor you just made getting hot.
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A wire that is crossed over itself, like when simple-knotted, self-cancels its inductance. That's why you use a "twisted pair" of conductors, they cancel their inductance because of the crossed magnetic fields.
Oh, and an inductor heats up because of its bulk resistance, not its inductance. But that's beside the point.
The copper would most likely not be fine. Yes it is stranded, but at some point each of those strands is a solid wire, and solid wire breaks when bent. As RufflesRidge mentioned, wire is not rope.
While a knot would be OK in some applications, in FRC the wires are subjected to significant vibration and shock, and most teams would prefer to have high reliability - knotting a wire dramatically reduces its reliability.
If you absolutely must have a 'lump' to prevent a wire from passing through a hole, then adding something to the outside of the wire - a proper strain relief, or perhaps just a wire tie - is a superior choice.