Cable tray tees in different sizes

Cable tray tees are available in widths ranging from 50mm to 900mm, with depth and material options varying by duty and application.

Standard Widths and Depths

Cable tray tees, including equal and unequal tees, are designed to match the widths of the main cable tray runs. Standard widths typically range from 50mm to 900mm, accommodating light, medium, and heavy-duty applications . Depths (or sidewall heights) generally follow the same range as the main tray, often between 25mm and 150mm, depending on cable volume and ventilation requirements .

Tee Types

• Equal Tees: All three branches of the tee have the same width, used when the main and branch runs carry similar cable loads .
• Unequal Tees: One branch differs in width, allowing connection to a smaller or larger tray run, useful for branching off to different cable volumes .

Material and Finish Options

Cable tray tees are manufactured in various materials to suit environmental and load requirements:

• Mild steel pre-galvanized (PG)
• Mild steel hot-dip galvanized (HDG)
• Stainless steel grade 1.4404 (316L) (SS) Covers, either closed or ventilated, are available for all tee types to protect cables and maintain proper airflow .

Practical Considerations

When selecting a cable tray tee:

• Ensure the width of the tee matches the main and branch tray widths for proper cable fill and structural integrity.
• Consider future expansion, typically leaving 25–40% spare capacity in the tray.
• Match the duty rating (light, medium, heavy) to the expected cable load and environmental conditions . By following these guidelines, cable tray tees can be properly sized to maintain compliance with NEC, IEC, and NEMA standards while ensuring safe and efficient cable management.