Cable routing duct, 3-field, RAL7035, for wall mounting. Electrical installation duct system RK routing duct made of plastic as a transition between laid cables or installation ducts and distribution cabinets. Routing duct set consisting of duct profile with predetermined breaking points for notching installation ducts for depths of 40, 50 and 60 mm. Two profile holders for cabinets up to field width 800 mm and three profile holders up to field width 1300 mm. Attachable end caps for left and right must be closed.