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I do lighting design in small theaters & have a fair amount of my own gear. I have a ton of 3-pin, 4-pin, and 5-pin XLR cables, and also some adapters that convert between 3&5 pin. I use colored zip ties on the ends of each cable to not only tell me what type of cable it is but to distinguish my cables from the theaters cables.
I’ve worked in some big data centers. The network wiring, thank god, is labeled on each end with a unique number. They come from the supplier like that, and are tracked for decom just like anything else.
Otherwise, 20cm diameter bundles, yeah.