Narrow webs and slots for smaller cable diameters. Smooth, burr-free edges protect users and cables. Burr-free removal of webs and wall segments thanks to predetermined breaking points. Secure fit of the cover even under difficult conditions such as vertical installation and vibration. Covers flush on the sides for optimal use of space. Additional retaining lug that prevents the cables from slipping. Base perforation according to DIN EN 50085. The HelaDuct HTWD-PD (DIN dimensions) wiring ducts are used in control cabinets and switchgear to guide and protect cables.