12 defines the specific locations and uses where cable tray systems are prohibited. If the tray structure or the cables it contains are compromised, the electrical system's. NEC Section 392. According to the 2005 National Electrical Code® (NEC), a cable tray system is “ unit or assembly of units or sections and associated fittings forming a structural system used to securely fasten or support cables and raceways. NEC section 300-8 does not permit any tube, pipe, or equal for water, air gas, drainage, steam, or any service other than electrical in raceways or cable trays containing. Cable trays are a popular option for managing cables in various types of buildings and facilities. However, not all installations require cable trays, and it's. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray.
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