Mesh Cable Tray Manufacturing Standards

Wire mesh cable trays must comply with NEMA VE 1/VE 2, UL 568, IEC 61537, and NEC/EN installation standards to ensure structural integrity, safety, and regulatory compliance.

Key Standards and Guidelines

NEMA VE 1 and VE 2 define the manufacturing requirements for metal cable trays, including wire mesh types, specifying materials, dimensions, load/span ratings, and associated fittings for safe electrical installations in accordance with the National Electrical Code (NEC) in the US . VE 2 provides detailed guidance on design, fabrication, and installation practices, ensuring uniformity across manufacturers . UL 568 covers performance and safety requirements for fiberglass and metal cable trays, including wire mesh trays, ensuring they can safely support power and control cables under expected environmental and mechanical conditions . Compliance with UL 568 is often required for project approvals and insurance purposes. IEC 61537 / EN 61537 is the international standard for cable tray systems, including wire mesh trays, specifying mechanical strength, electrical continuity, and testing procedures for both metal and nonmetallic trays . This standard is widely referenced in EU projects and ensures compatibility with global electrical installations. NEC Article 392 provides installation requirements for cable trays in the US, including permitted uses, maximum fill, grounding, and bonding requirements . Similarly, NFPA 79 and the Canadian Electrical Code (CEC C22.1-Part 1) provide guidance for industrial machinery and Canadian installations, respectively .

Material and Construction Requirements

Wire mesh cable trays are typically manufactured from high-strength steel wire, often with pre-galvanized, hot-dip galvanized, or stainless steel (AISI 316L) finishes to resist corrosion . Aluminum alloys are also used for lightweight and corrosion-resistant applications. The mesh design allows ventilation, reduces heat buildup, and supports cable management for power, data, and instrumentation systems . Design considerations include rung spacing (commonly 6–9 inches), tray width, load/span ratings, and bend radius to prevent cable damage. Covers may be added for dust protection and safety, and grounding/bonding continuity must be maintained throughout the system .

Compliance and Documentation

Manufacturers must provide CE marking in Europe or UL/NEMA certification in the US, demonstrating compliance with applicable standards . Documentation should include material specifications, load ratings, installation instructions, and test certifications. Proper procurement practices require specifying these standards in RFQs to ensure suppliers meet project and regulatory requirements .

Summary

To manufacture or select wire mesh cable trays, compliance with NEMA VE 1/VE 2, UL 568, IEC/EN 61537, and NEC/EN installation codes is essential. Material selection, structural design, grounding, and documentation are critical for safety, performance, and regulatory approval in both US and EU projects .