Cable tray horizontal turning techniques

Horizontal turning of cable trays is achieved using standard horizontal bends, adjustable bends, or flexible splice plates to change the tray direction while maintaining smooth cable routing.Methods for Horizontal Turns1. Standard Horizontal Bends: Cable tray systems often include pre-fabricated horizontal bend fittings, typically available in 30° or 60° angles, which allow the tray to turn around obstacles or change direction along a horizontal plane. These bends are designed with smooth radii to facilitate cable pulling and reduce stress on the cables ( ). 2. Adjustable Horizontal Bends: For situations where standard angles do not fit the installation requirements, horizontal adjustable bends or flexible splice plates can be used. These allow field customization of the bend angle. Installation involves marking the desired angle, cutting the tray if necessary, and attaching the splice plates with included hardware. Supports are required within 24 inches (600 mm) on both sides of the splice to ensure stability ( ). 3. Calculating Offsets and Bend Requirements: When a horizontal turn is needed to bypass obstacles, an offset calculation helps determine the required straight section length and bend angles. Tools and calculators can estimate the horizontal run, cut marks, and installation feasibility based on the total offset distance and desired angle. This ensures the tray maintains a continuous path without sharp bends that could damage cables ( ).Installation ConsiderationsSupport Spacing: Ensure proper support near bends and splice plates to prevent sagging or stress on the tray.Smooth Radius: Use bends with smooth curves to facilitate cable pulling and reduce mechanical strain.Field Cutting: If using adjustable bends, carefully mark and cut the tray, considering rung locations to avoid weakening the structure ( ).Hardware and Bonding: Most adjustable splice plates come with hardware; bonding jumpers are typically not required.SummaryHorizontal turning of cable trays can be accomplished using pre-fabricated bends, adjustable bends, or flexible splice plates, depending on the installation requirements. Proper planning, support, and smooth radius design are essential to maintain cable integrity and ensure a safe, efficient cable management system ( ).