LABELS / CABLE IDENTIFIERS FOR MARKING WIRE, COPPER AND FIBER OPTIC CABLES
Horizontal and backbone subsystem cables shall be labeled at each end. For proper administration, additional cable labeling may be required on the cable at intermediate locations such as conduit ends, backbone splicing points, manholes, and pull boxes. It may be desirable that both end termination positions be marked on the cable or its labels.
A horizontal link identifier, unique within the building, shall be assigned to each horizontal link and to its elements. Each end of a horizontal cable shall be labeled ...within 12 inches of the end of the cable jacket and visible on the exposed end of the cable jacket