How are parallel bends made in cable trays

Parallel bends in cable trays are created by carefully marking, cutting, and bending the tray sections to maintain alignment and proper cable routing while respecting bend radius requirements.

Understanding Parallel Bends

Parallel bends are used when a cable tray needs to change direction while keeping multiple runs of cables aligned side by side. These bends are common in wire mesh, perforated, or solid trays and are essential for maintaining neat, organized, and safe cable routing.

Steps to Create Parallel Bends

1. Mark the Bend Area Measure and mark the exact location where the bend is required. Ensure the marks are consistent across all parallel tray runs to maintain alignment .
2. Prepare the Tray For wire mesh trays, use bolt cutters or cable cutters to partially cut the wires along the bend line. For solid or perforated trays, a bending machine or manual crimping tool may be used .
3. Bend the Tray
   • Wire Mesh Trays: Use pliers or a nose plier to gradually bend the tray along the marked line. Apply even pressure to avoid deforming the tray and maintain the correct angle.
   • Solid/Perforated Trays: Use a cable tray bending machine or a metal bar to create the bend. Crimping may be applied to facilitate sharper angles without damaging the tray .
4. Check Alignment and Radius Ensure the bend maintains the minimum cable bend radius to prevent cable damage. All parallel runs should be aligned and supported to avoid sagging or stress on the cables .
5. Secure and Support After bending, install supports or brackets at the bend to maintain stability. This is especially important for long parallel runs or heavy cable loads .

Tools Required

• Measuring tape and marker/chalk
• Bolt cutter or cable cutter (for wire mesh trays)
• Pliers or nose pliers
• Metal bar or cable tray bending machine (for solid/perforated trays)
• Safety gloves and protective equipment

Best Practices

• Avoid sharp bends that exceed the cable's minimum bend radius.
• Do not cut all wires completely in wire mesh trays; leave enough to maintain structural integrity .
• Support the bend area to prevent deformation or sagging.
• Ensure all parallel bends are consistent to maintain a professional and safe installation. By following these steps, parallel bends can be made efficiently on-site, allowing for flexible cable routing without the need for pre-fabricated fittings, especially in wire mesh cable trays .