Post History

Is concentric twist a common practice?

I have seen multiple sources on the web discussing what they call concentric twist harnesses. It boils down to having a wiring harness built in layers, where each layer is twisted around the previous one in alternating directions, as shown there :

![Picture of a concentric twist harness](https://electrical.codidact.com/uploads/t3uawk4frfgaodq9xp9p5obt0lig)
[Original tweet](https://twitter.com/SpecWiring/status/1276833047527280641)

While most of the arguments in favor of the technique make sense to me (space optimisation, less crosstalk between layers, better strain distribution between individual wires, and overall aesthetics), I cannot find any manufacturer specification, white paper, of other kind of litterature on the topic. It seems to only be used and talked about in motorsport communities, despite some calling it "Milspec wiring"

Is concentric twist a valid and common technique, a niche topic, or a broader concept, maybe under a different name?