The placement of cables, ducts, and conduits can be done using cable trays – for both outside plant (OSP) and interior spaces (ISP). This allows cables and ducts to be installed quickly and readily accessed for maintenance, adding more cables/ducts, or fast removal. Through NEMA and the Cable Tray Institute numerous articles, standards, and other general guidance can be found regarding the proper use and installation of cable tray systems. The cable tray system is only one component of the cable management system. Here's what you need to know: Cable Types: Only use. Section 690. Article 392. Light-duty applications, frequent reconfigurations, IT/Data Centers (less common outdoors). These are the practical, on-the-ground considerations.