Installation diagram of right-angle bend in cable tray

A right-angle bend in a cable tray can be installed by either using a pre-manufactured 90° fitting or fabricating one from straight tray sections, following careful measurement, cutting, bending, and securing steps.

Steps for Metal Cable Trays

Measure and Mark: Determine the location of the 90° turn and mark the centerline on the tray where the bend will occur. Prepare the Tray: Remove the tray lip along the bend area using a hand grinder or file, taking care to maintain safety equipment. Cut and Relieve: Cut along the centerline and, if necessary, make relief cuts to prevent the tray from opening or deforming.

Bend the Tray: Use a blunt object or bending tool to gradually form the tray to a 90° angle. For wire mesh trays, a bolt cutter can be used to create bends live on-site. Reinforce with Gussets: Measure the internal edges and fabricate a gusset from tray material to bolt onto the bend, ensuring structural integrity.

Secure the Bend: Use bolts and splice plates to fasten the bent section to the straight tray lengths. Ensure smooth heads face inward to avoid cable damage.

Steps for PVC Cable Trays

Measure and Mark: Confirm tray width, thickness, and mark the centerline for the bend. Cut Relief Slots: For flexible PVC trays, cut short relief slots along the inner flange to allow compression without cracking. Form the Bend: Slowly bend the tray along the marked line.

For cleaner joints, miter the ends at 45° and bond or fasten them to form a 90° corner. Secure and Support: Clamp the bend in place and attach to the support structure using appropriate brackets or hold-down units.

Safety and Best Practices

Always wear safety glasses, gloves, and protective clothing when cutting or bending metal or PVC trays. Ensure bends are smooth and free of sharp edges to prevent cable damage. Use gussets or splice plates to maintain structural strength at the bend.

For wire mesh trays, rubber caps can protect cut ends and maintain safety. By following these steps, you can successfully install a right-angle bend in both metal and PVC cable trays, ensuring proper cable routing and structural integrity.