Cable tray bottom right overcut method

The bottom right overcut method involves carefully cutting the cable tray at the bottom right corner to allow cable exit while maintaining structural integrity and safety.

Overview

The bottom right overcut is typically used when cables need to exit the tray at a specific corner, often for routing to equipment or junction boxes. This method ensures that the tray maintains its load-bearing capacity and prevents sharp edges that could damage cables or pose safety hazards.

Cutting Procedure

1. Mark the Cut Location: Identify the exact point on the bottom right corner where the cable will exit. Ensure the cut does not interfere with tray rungs or support points .
2. Select Appropriate Tools: Use a band saw or circular saw with a blade suitable for the tray material (steel, aluminum, or FRP). For fiberglass trays, cut in 300 mm increments to maintain strength .
3. Protect the Material: Secure the tray on a stable surface to prevent movement. Avoid excessive pressure to reduce chipping or rough edges. For FRP or resin trays, avoid overheating, which can soften or burn the material .
4. Perform the Overcut: Cut slightly beyond the intended exit point to create a smooth opening. Ensure the cut edge is inside the starter bracket or support if possible, which helps maintain torsional strength .
5. Deburr and Smooth Edges: After cutting, remove sharp edges using a file or deburring tool. This prevents cable insulation damage and ensures safe handling .

Safety Considerations

• Always wear Kevlar gloves, eye protection, and appropriate PPE when cutting trays .
• Ensure the work area is clear of flammable materials, especially when using power tools.
• Follow local and national health and safety regulations.

Best Practices

• Cut between pre-drilled holes or rungs to maintain structural integrity .
• For ladder-type trays, maintain proper rung spacing (6–12 inches) to support small-diameter cables and prevent drooping .
• Consider using drilling jigs for splice connections if the tray will be joined to another section .
• Avoid excessive heat during cutting to prevent resin or metal deformation . By following these steps, the bottom right overcut method allows for precise cable routing while preserving the tray's strength and ensuring safe installation. Proper planning and adherence to cutting guidelines are essential for both performance and safety.