Cable routing duct made of sheet steel LFS 20x20mm traffic white. Electrical installation duct system Cable routing duct made of sheet steel in accordance with DIN EN 50085-1 for laying cables. Duct bottom/top with pre-punched holes in the bottom at 200 mm intervals. Couplings for the potential equalization connection of the duct bottom sections and for simple and precise duct connection. Note: Potential equalization, earthing, sound and fire protection measures must be carried out professionally.