Installation of Dutch Tray Cable Trays

Dutch tray cable trays should be installed with careful planning, proper support, and adherence to material and code requirements to ensure safe, durable, and organized cable management.

Planning and Preparation

Before installation, review the approved shop drawings to determine the layout, length, and location of the Dutch trays in the building or facility . Inspect all materials upon delivery to ensure they match the approved specifications and are free from damage . Store trays horizontally on a flat surface with timber supports at intervals of about one meter, protecting them from moisture and sunlight .

Material Selection

Dutch trays are available in light-duty tray designs with continuous longitudinal slot perforations, suitable for industrial, marine, and machine-building applications . They can be made from steel, aluminum, or fiberglass-reinforced polyester (FRP) depending on environmental conditions, with FRP offering corrosion resistance and non-conductivity for high-moisture or chemical environments . Covers can be added for full enclosure, using lid clamps or fasteners to protect cables from dust and mechanical damage .

Mounting and Support

Proper support is critical to prevent sagging and maintain safety. Support spans typically range from 3 to 6 meters, depending on tray type and load . Common support methods include trapeze hangers for ceiling installations and cantilever wall brackets for vertical runs . Ensure supports are spaced according to manufacturer load charts and NEC Article 392 guidelines to maintain structural integrity .

Installation Steps

1. Route Planning: Mark the tray route considering clearance, cable separation, and load requirements .
2. Tray Alignment: Align trays straight and level, connecting sections with appropriate fittings and connectors .
3. Cable Laying: Lay cables neatly, using cable ties or straps to separate by voltage and function. Leave slack for expansion or future adjustments .
4. Bonding and Grounding: Ensure all trays are properly bonded and grounded according to NEC requirements to prevent electrical hazards .
5. Inspection: After installation, inspect for proper alignment, secure mounting, and absence of damage to trays or cables .

Maintenance Considerations

Dutch trays allow for easy access for future cable additions or maintenance. Periodically check for loose fasteners, corrosion, or cable overfill, and ensure that the tray remains compliant with load and spacing requirements . By following these steps, Dutch tray cable trays can be installed safely, efficiently, and in compliance with electrical codes, providing a durable and organized cable management system for industrial, commercial, or marine applications .