Particularly 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. Simple and secure attachment of accessories using mounting points. Retaining brackets and other accessories do not protrude from the duct floor. The cover sits securely even under difficult conditions such as vertical installation and vibration. Covers flush on the sides for optimal use of space. The HTWD-PN wiring ducts can therefore also be installed close together with the cover. Additional retaining lug from a height of 80 mm, which prevents the cables from slipping. Base perforation according to DIN EN 50085. The HTWD-PN wiring ducts are used in control cabinets and switchgear and are very suitable for cables with a smaller cross-section.