Schnieder (and many others) call it busbar trunking. I get a lot of images that match your context. For your context you don't need to use 'system."

My experience otherwise is that Alibaba's translators are not entirely reliable language-wise on technical questions like this one. But that's an observation, not findings in a formal study. ;-)


https://www.se.com/uk/en/product-range/1749-canalis-kbb/?pre...