Does the cable tray support include the cable tray itself

Cable trays are not designed to support other cable trays; each tray must be independently supported according to manufacturer specifications and NEC guidelines.Structural ConsiderationsCable trays are engineered to carry the weight of electrical cables and associated hardware, not the additional load of another tray. Using one tray to support another can exceed the load capacity, compromise mechanical integrity, and create safety hazards such as sagging, deformation, or failure under weight . Each tray type—ladder, perforated, or wire mesh—has a specified support span and load rating that must be followed to ensure safe installation .NEC and Code ComplianceThe National Electrical Code (NEC) Article 392 requires that cable trays be supported at intervals specified by the manufacturer, typically no more than 4–5 feet for horizontal runs . NEC compliance ensures that trays are properly anchored and that the system can safely carry the intended cable load. Stacking trays without independent supports would violate these requirements and could lead to code violations .Recommended Support MethodsProper support methods include:Trapeze hangers for ceiling suspensionsCantilever wall brackets for vertical or wall-mounted runsIndependent strut or threaded rod supports for each tray section Each tray should be attached to its own support system, and overfilling or overloading must be avoided to prevent overheating or mechanical failure .Practical AdviceIf multiple trays are needed in the same area, they should be mounted on a shared support structure (like a common strut or rack) rather than one tray resting on another. This approach maintains structural integrity, ensures compliance with NEC standards, and allows for safe cable management and future maintenance . Conclusion: Never use a cable tray to support another cable tray. Each tray must have its own properly designed support system to meet load, safety, and code requirements.