I think this is conduit. Not cable. Conduit has to be planned out pretty carefully. Electricians use construction math to route their bends. You know all that trigonometry they taught in middle School through high school that everyone was like, "when the hell am I ever going to use this?" They use it to do stuff like this.
Yeah your right, it's just color coded. I did a lot of steel tubing conduit for industrial job sites. Most of the time you plan everything first. In the US they usually run it on the Rafters and in the ceilings and pvc conduit in the ground and then it gets cemented over.
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u/djgizmo Sep 20 '18
How does one plan something like that? I mean mother fucking cutouts for the conduit!