While there are several specific types of listings for power cables, specifically for tray applications, there is no equivalent tray rating for optical fiber cables. According to the 2014 National Electric Code® (NEC), any listed optical fiber cable is acceptable. The purpose of this AE Note is to outline the use of fiber optic cables in “tray rated” environments. 7 products are successfully used to protect cables in high-rise buildings, industrial buildings, and offshore facilities as well as in sensitive areas, such as hospitals, airports, production. Cable tray is one of the most common methods of supporting wire and cable. Tray can be manufactured in various types of material including aluminum, steel and fiber and other nonmetallic materials. Cable tray. Fire-resistant cable trays that support electrical and communication cables in hospitals must be made of fire-resistant materials to ensure uninterrupted operations during emergencies. High-rise buildings. Type TC – Tray Cable – (NEC Article 336) –Power and control tray cable type TC is a factory assembly of two or more insulated conductors, with or without associated bare or covered grounding conductors, under a non-metallic jacket. TC cables are rated for 600 volts and can be used in industrial. o 1200°C (2192°F). The core fibers inside this FireMaster Cable Wrap are made using Morgan Advanced Materials patented Superwool®, low biopersistent man facturing technology.