Specifications for Flexible Cable Tray Profiles

Flexible cable tray connections are designed to accommodate tight bends, variable routing, and secure grounding while supporting tray-rated cables in industrial and commercial installations.

Mechanical and Dimensional Specifications

Flexible cable trays, such as Eaton's Flextray system, are field-adaptable and can be cut or bent on-site to meet installation requirements. Key mechanical specifications include: Bend Radius: Flexible trays allow tighter bends than rigid trays, accommodating finely-stranded (Class K) tray cables with smaller bend radii for efficient routing. Width and Length: Trays are available in a wide range of widths and lengths to match cable bundles, with modular sections that can be connected using UL Classified splices.

Load Capacity: Determined by tray width, material thickness, and support span; flexible trays are designed to support both power and control cables without excessive sag. Material and Finish: Common materials include steel or aluminum with finishes suitable for indoor, outdoor, or corrosive environments. Finishes may include powder coating, galvanized, or stainless steel options.

Electrical and Grounding Specifications

Flexible cable trays often serve as an equipment grounding conductor. Grounding can be achieved by: Using the recommended number of UL Classified splices at tray connections and cut points. Running an appropriately sized ground wire alongside the tray and connecting it at each section and cut, as recommended by NEMA VE-2 standards.

Cable CompatibilityTray-Rated Cables (TC): Flexible trays are compatible with TC, TC-ER, PLTC-ER, and ITC-ER cables, which can be installed directly in trays without conduit. Flexibility: Finely-stranded cables allow tighter bends and easier terminations, reducing labor and material costs compared to rigid conduit installations. Environmental Resistance: Many tray-rated cables are resistant to UV, oil, and direct burial, making them suitable for exposed runs and hazardous locations.

Installation Considerations

Modular Connections: Flexible trays can be connected using splices, clamps, or brackets to form continuous runs. Support: Trays can be mounted to floors, walls, ceilings, or equipment racks, with proper spacing to maintain load capacity. Safety Edges: Some systems feature “T” weld safety edges to protect cables and installers during installation.

Summary

Flexible cable tray connections provide versatile routing, secure grounding, and compatibility with tray-rated cables, making them ideal for industrial automation, data centers, and complex installations. Proper attention to bend radius, load capacity, grounding, and cable type ensures safe and efficient cable management while reducing installation time and cost.