Connection of flat iron to cable tray

A flat iron (flat bar) can be securely connected to a cable tray using appropriate mounting brackets, bolts, and support elements while ensuring compliance with load and safety standards.

Methods of Connection

1. Using Mounting Brackets: Flat iron is typically attached to the cable tray via mounting brackets or support plates. These brackets are designed to hold the flat bar firmly against the tray's side rails or bottom, providing a stable support for additional equipment or cable routing . Ensure the bracket is compatible with the tray type (ladder, perforated, or solid-bottom). 2. Bolted Connections: Secure the flat iron using bolts, nuts, and washers through pre-drilled holes in the tray or brackets. For most commercial and industrial installations, two bolts per connection point are recommended to maintain structural integrity and prevent movement . Use corrosion-resistant hardware if the installation is in a humid or outdoor environment. 3. Support and Spacing Considerations: Cable tray systems require proper support spacing to avoid deflection. The flat iron should be connected at intervals consistent with the tray's maximum load capacity and support span, typically following NEMA VE-1 and VE-2 standards . For heavy loads, consider using center suspensions or additional strut supports. 4. Grounding and Electrical Safety: If the flat iron is metallic and part of the electrical installation, ensure it is properly grounded to prevent electrical hazards. Some cable trays have integrated grounding provisions, or a separate grounding wire can be attached to the flat iron and tray . 5. Compliance with Standards: Follow relevant codes such as NEC, CEC, or DIN EN 61537 for industrial installations. These standards define acceptable materials, load ratings, and installation practices for cable trays and their support elements .

Practical Tips

• Pre-drill holes in the flat iron to match the tray or bracket pattern.
• Use lock washers or spring washers to prevent loosening due to vibration.
• Avoid using the flat iron as a lifting point for trays; it is meant for support only .
• Verify that the flat iron does not obstruct cable routing or violate minimum bend radius requirements . By following these guidelines, a flat iron can be safely and effectively connected to a cable tray, providing a reliable support structure for cables and associated equipment.