Climbing or routing cables through cable tray tees requires proper use of accessories, secure support, and adherence to safety standards to ensure both structural integrity and safe cable management.

Understanding Cable Tray Tees

A cable tray tee is a junction that allows a main cable tray run to branch into two directions, forming a “T” shape. Tees can be horizontal (on the same plane) or vertical (changing elevation), and they are used to route cables efficiently while maintaining support and organization . Proper installation ensures that cables are not stressed, bent excessively, or unsupported at the junction.

Methods for Climbing or Routing Cables

1. Use of Accessories
   • Employ vertical bends, horizontal bends, and tee accessories designed for the specific tray type (perforated, ladder, or solid-bottom) to facilitate smooth cable transitions .
   • Accessories reduce sharp bends and prevent cable damage, making it easier to “climb” or redirect cables through the tee.
2. Support and Load Management
   • Ensure the tee and connected trays are adequately supported according to load requirements, including the weight of existing and future cables .
   • Check that deflection limits are not exceeded and that the tray system is installed per manufacturer specifications and BS EN 61537 standards .
3. Cable Handling Techniques
   • For vertical tees, gradually feed cables using pulling ropes or fish tapes to avoid excessive tension.
   • Maintain proper bend radius for each cable type to prevent insulation damage.
   • Use temporary supports or scaffolding if necessary to safely guide cables through elevated tees .
4. Safety Considerations
   • Do not use the cable tray as a ladder or support for personnel, as this can cause injury and damage the system .
   • Ensure all work is performed by competent personnel familiar with electrical installation practices and safety standards .
   • Pre-plan the cable route and tee installation to minimize the need for excessive climbing or manual handling.
5. Sequential Installation
   • Install the main tray run first, then attach the tee and branch tray.
   • Feed cables into the main tray and branch sequentially, using pulling aids and ensuring cables are balanced and restrained to prevent sagging .

Summary

Climbing cable tray tees safely involves using the correct accessories, supporting the tray system properly, maintaining cable bend radii, and following safety standards. Horizontal and vertical tees require careful planning, and all work should be performed by trained personnel to prevent damage to cables and ensure structural integrity . Proper preparation and accessory use make the process efficient and safe.