In the past, cable festoon systems were used in the pretreatment line of Wiegel's hot dip galvanising plants. Cables and hoses were suspended and moved on small trolleys. A disadvantage of this technology, however, is that at the end of the travel, a cable station takes up a lot of space and for this reason the space of the pretreatment line cannot also be completely sealed off. The rollers of the cable trolleys also fail after some time, because the C-profiles in which they are guided become corroded and sharp-edged due to the acid exposure. As a result, the rollers quickly wear out.