Convert a standard tee cable tray to a reducing tee

A standard cable tray tee can be converted to a reducing tee by using a horizontal reducing tee fitting or by combining a standard tee with a reducer to accommodate different tray widths.Understanding the DifferenceA standard tee connects three cable tray sections of the same width, forming a “T” junction. A reducing tee allows one branch to connect to a tray of smaller width, enabling transitions between different tray sizes without cutting or modifying the main tray excessively .Methods to ConvertUse a Horizontal Reducing Tee Fitting Manufacturers like ATKORE provide horizontal reducing tees specifically designed for I-BEAM or ladder tray systems. These fittings are compatible with NEMA standard trays and allow a smooth transition from a larger main tray to a smaller branch tray .Combine a Standard Tee with a Reducer If a reducing tee fitting is not available, you can install a standard tee and attach a cable tray reducer at the branch connection. Reducers are available in various sizes (e.g., 6"x6" to 4"x4") and materials such as stainless steel or galvanized steel . This method may require on-site adjustments to ensure proper alignment and secure connections.On-Site Modifications In some installations, the main tray may need to be cut or notched to fit the branch tray properly, especially when using a branch piece instead of a full tee. This is common in practical field installations and can speed up assembly while maintaining structural integrity .ConsiderationsEnsure the fitting class matches the tray system (Class 1–4) for flange width and load capacity .Verify material compatibility (mild steel, stainless steel, or pre/post-galvanized) to prevent corrosion.Check that the splice plates and connectors align correctly to maintain mechanical stability and electrical grounding continuity . By selecting the appropriate reducing tee or combining a standard tee with a reducer, you can effectively convert a standard cable tray tee to a reducing tee while maintaining structural and electrical integrity.