In addition to the covers, optional accessories in various materials and coatings are available to supplement the cable support system, e. gutter connectors, connecting plates, separating strips and protective rings. For this Underware uses an extensive set of different cable. OBO Bettermann's mesh cable tray systems are the ideal basis for quick, safe and economical cable routing in all areas of professional electrical installations. We also. Cable trays are components used in the wiring of buildings to support insulated cables and organise them to be hidden from view. They offer an alternative to open wiring or electrical conduit systems and are necessary for cable management in commercial and industrial construction, as well as.