Connection methods of cable trays and hangers

Yes, cable trays can be safely connected to hangers, which are designed to support their weight and the cables they carry.OverviewCable trays are commonly supported using hangers to maintain a secure, elevated, and organized routing of electrical cables. Hangers provide the mechanical support necessary to prevent sagging or structural failure, ensuring the system remains safe and functional . They are particularly important in industrial and commercial installations where cable loads can be significant.Types of Hanger SupportsTrapeze or swing supports: These are the most common types, allowing the tray to be suspended from the ceiling or structural beams .Rod or threaded supports: Rods are threaded and attached to the ceiling, with nuts pre-threaded to secure the tray at the correct elevation .Wall brackets and center suspensions: Used for side-mounted or centrally supported trays, providing additional stability .Installation GuidelinesSpacing: Hangers should be spaced according to the tray type and load, typically 1.5 to 3.6 meters apart depending on the system and weight of cables .Load capacity: Each hanger has a maximum load rating, often between 318 kg (700 lbs) and 340 kg (750 lbs) per support .Alignment: Proper alignment is crucial to prevent bending or stress on the tray. Pre-threading nuts and using a string or wire to establish elevations can help maintain level installation .Material and finish: Hangers should match the environmental conditions, such as using hot-dip galvanized steel in wet areas to prevent corrosion .Safety ConsiderationsOnly use hangers and tray components designed and tested together as a system to ensure safety and compliance with standards like BS EN 61537 .Avoid using cable trays as walkways or for supporting personnel, as they are intended solely for cable support .Ensure that the total load, including cables and equipment, does not exceed the rated capacity of the hangers or tray system .ConclusionConnecting cable trays to hangers is a standard and safe practice when done according to manufacturer guidelines and industry standards. Proper selection of hanger type, spacing, and load capacity ensures the structural integrity of the cable support system and prevents hazards such as sagging or cable damage .