Cable tray angle change

Cable tray angles can be changed using adjustable fittings, flexible splice plates, or calculated offsets to navigate obstacles while maintaining cable continuity.

Adjustable Fittings

For horizontal or vertical angle changes, specialized fittings like adjustable corner pieces (SRS) or elbow joints (RVS) can be used.

The SR

S adjustable corner allows a range of 0–75°, while the RVS elbow joint can handle -90° to +90° horizontal orientation changes. These fittings are inserted into the cable tray and secured with the included screw sets, providing a simple way to modify the tray direction without cutting the tray itself.

Flexible Splice Plates

When standard fittings do not fit the required angle, flexible horizontal adjustable splice plates can be used. These plates are installed in pairs and allow field adjustments to achieve the desired angle. Installation involves: Preparing the cable tray and splice plates.

Marking and cutting the tray to match the desired angle. Removing any affected rungs before assembly. Securing the splice plates with the provided hardware.

Supports must be installed within 24 inches (600 mm) on both sides per NEMA VE2 standards.

Calculating Offsets

For precise planning, a cable tray offset calculator can determine the required sloped section length, horizontal run, and cut marks based on the bend angle and offset distance. This is particularly useful when bypassing obstacles like columns, HVAC ducts, or plumbing. The calculator uses trigonometry and industry multipliers to provide exact dimensions for fabrication and installation.

Software Settings

In design software like Revit, the Angles pane in Electrical Settings allows specifying fitting angles for cable trays. Options include using any supported angle, setting an angle increment, or defining specific angles. This ensures accurate modeling and can be transferred between projects using the Transfer Project Standards feature.

Summary

Use adjustable fittings for standard angle changes. Use flexible splice plates for custom or non-standard angles. Use offset calculations to plan precise bends and ensure proper installation.

Utilize design software settings for accurate modeling and documentation. These methods ensure that cable trays can navigate complex layouts while maintaining structural integrity and cable management standards.