Wire mesh cable trays can be concealed during construction, but careful planning is required to maintain accessibility, ventilation, and code compliance.

Feasibility of Concealment

Wire mesh cable trays, also known as basket trays, are designed to support and organize cables while allowing airflow and easy access for maintenance . Concealing them within walls, ceilings, or raised floors is possible, but it requires ensuring that the trays remain accessible for inspection, cable pulling, and future upgrades, as mandated by NEC Article 392 . Fully enclosing trays without access can violate safety codes and complicate maintenance.

Best Practices for Concealed Installation

1. Use Appropriate Supports: Even when concealed, trays must be securely mounted using brackets, riser clamps, or hangers to prevent sagging or structural failure . Supports should follow manufacturer specifications and maintain proper spacing, typically no more than 1.2 meters apart for horizontal runs .
2. Maintain Clearance: Ensure sufficient space around the tray for cable bending radii, heat dissipation, and future cable additions . Overcrowding or tight bends can damage cables and reduce performance.
3. Consider Covers: While wire mesh trays are ventilated, adding covers can protect cables from dust, debris, or accidental contact, especially in concealed areas where access is limited .
4. Plan Routes Early: Coordinate with civil and MEP teams during construction to integrate trays into walls, ceilings, or service corridors without interfering with other systems . Pre-planning avoids costly modifications later.
5. Compliance with Codes: Only use tray-rated cables (Type TC) or metal-armored cables (Type MC) in concealed installations to meet NEC requirements . Avoid using trays as fully enclosed raceways unless specifically designed for that purpose.

Advantages and Considerations

• Concealed trays improve aesthetics and reduce exposure to physical damage.
• Wire mesh trays are lightweight and ventilated, making them easier to integrate into ceilings or raised floors.
• Accessibility must be preserved; removable panels or access points are recommended for maintenance.
• Overloading or improper concealment can lead to sagging, overheating, or code violations . In summary, wire mesh cable trays can be concealed during construction if proper supports, clearances, and access points are provided, and if installation follows NEC guidelines and manufacturer specifications. Planning and coordination with construction and electrical teams are essential to ensure safety, performance, and maintainability.