How to fix the cable tray base plate

Cable tray base plates are fixed using brackets, metal plugs, and nuts to secure the tray to walls, floors, or ceilings, ensuring stability and proper support spacing.

Base Plate Fixing Overview

Cable tray base plates serve as the primary interface between the tray and the supporting structure. They are typically used in floor-mounted, wall-mounted, or ceiling-suspended installations. The fixing method involves:

• Drilling holes in the structural surface where the base plate will be mounted.
• Using appropriate metal plugs or anchors to secure the base plate to concrete, masonry, or steel surfaces.
• Attaching the cable tray support to the base plate with nuts, bolts, or threaded rods, depending on the design and load requirements .

Mounting Options

1. Wall-Mounted Brackets: Base plates are attached to brackets fixed on walls. This method is common for vertical runs and allows easy adjustment and maintenance .
2. Ceiling-Suspended Rods: Base plates can be connected to threaded rods hanging from the ceiling, providing height adjustment and keeping trays off the floor .
3. Floor-Mounted Bases: In industrial or heavy-duty applications, base plates are fixed directly to the floor using anchors or bolts, supporting heavy cable loads .

Support Spacing and Accessories

• Support spacing is critical to prevent sagging. Typically, supports are placed every 1.2 meters, with additional supports 250 mm from bends, branches, or offsets .
• Accessories such as mounting clamps, tray hangers, and cable tie mounts help secure the tray and cables, maintaining alignment and continuity .
• Fire-rated walls require approved fire sealant around base plates where trays pass through to maintain fire integrity .

Installation Best Practices

• Ensure the base plate is level and aligned with the tray run.
• Trim any projecting supports for a neat finish.
• Follow manufacturer instructions for torque and fastener type.
• Test electrical continuity if copper earth links are used at joints . By following these methods, cable trays are securely fixed, maintain proper alignment, and comply with safety and mechanical load requirements.