Excellent fire protection properties according to UL94 and EN 45545-2. Particularly narrow ribs and slots for smaller cable diameters. Smooth, burr-free edges protect users and cables. Burr-free removal of ribs and wall segments through predetermined breaking points. Secure fit of the cover even under challenging conditions such as vertical installation and vibration. Flush side covers for optimal space utilization. Base perforation according to DIN EN 50085. HelaDuct HTWD-HF wiring ducts are used in control cabinets and switchgear where high demands are placed on personal or material safety - for example, in the event of a fire, to route and protect cables. This includes public transport, tunnel systems, data processing centers, or public buildings.