Fiber Raceway Duct, 4x12, 2 meters long, with lid. Fiber Raceways are an overhead system of plastic troughs used to route, protect and manage fiber optic cables. Belden’s LSZH Fiber Raceway portfolio offers a toolless, flexible system that provides complete protection of fiber cables. Our design tool enables data centers to quickly configure their networks, ensuring that no components are missed during the design phase.