Cable trunking and cable tray are two types of support systems used in electrical installations to organize, protect, and route cables and wiring. While they serve similar purposes, there are some differences in their design and application.

1. Cable Trunking: Cable trunking, also known as cable ducting or cable management trunking, is a rigid or semi-rigid enclosure that provides a secure pathway for cables and wires. It is typically made of plastic, metal, or PVC and comes in various sizes and shapes. Cable trunking is commonly used in commercial and residential buildings to conceal and protect electrical cables, data cables, and other wiring systems.

The main features and functions of cable trunking include:

• Organization and Concealment: Cable trunking organizes cables neatly within a closed enclosure, reducing cable clutter and providing a clean and professional appearance. It helps avoid tripping hazards and protects cables from accidental damage.
• Cable Protection: Trunking provides a physical barrier that shields cables from impact, moisture, dust, and other environmental factors, preventing potential electrical hazards and ensuring the longevity of the cables.
• Easy Access and Maintenance: Cable trunking often has a removable cover or access points that allow for easy installation, inspection, and maintenance of the cables inside. This facilitates cable additions, replacements, or repairs without the need for major disruptions.

2. Cable Tray: Cable tray, also known as cable ladder or wire mesh tray, is an open, grid-like structure made of metal or wire mesh materials. It provides a robust support system for routing and supporting cables in various industrial, commercial, and infrastructure applications.

The key features and functions of cable tray include:

• Cable Support and Routing: Cable tray supports and guides cables along predetermined paths, keeping them organized and preventing sagging or excessive tension. It offers flexibility in cable routing and allows for easy changes or additions to the cable layout.
• Ventilation and Heat Dissipation: The open design of cable trays promotes natural ventilation around the cables, helping dissipate heat generated by the electrical currents flowing through the wires. This aids in maintaining optimal operating temperatures for the cables and associated electrical equipment.
• Cable Management and Accessibility: Cable trays provide clear visibility of the cables, simplifying identification, labeling, and troubleshooting. They also allow for easy access to the cables for maintenance, modifications, and future expansion.

Both cable trunking and cable tray systems can be used in combination to meet the specific requirements of an electrical installation. The selection of the appropriate system depends on factors such as the type and quantity of cables, the environment, aesthetic considerations, and local electrical regulations.