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 e-chain® can be reduced for this application. The interior divisions can be freely selected without having to pay too much attention to strain relief. The modules are made of a cable-preserving plastic with high frictional resistance.