In the case of machine tools, the trend is also going in the direction of compactness. And this is a trend that the energy supply systems must also follow. Through the use of these new flexible, plastic strain relief modules, the space required by the energy chain cable carrier can be reduced for this application. The interior divisions can be freely selected without having to pay too much attention to strain relief. The cable carriers are made of a cable-preserving plastic with high frictional resistance.