Yes, cable trays are required to be clearly marked by the manufacturer, including type, material, and compliance information.

Manufacturer Marking Requirements

According to IEC 61537, which is the international standard for metal cable tray systems, every cable tray must be clearly marked by the manufacturer. These markings typically include:

• Tray type and material (e.g., steel, stainless steel, aluminum)
• Load rating and structural specifications
• Compliance with relevant standards (IEC 61537, NEMA VE 1, or NEC 392)
• Manufacturer identification and product codes
• Technical datasheets, installation manuals, and test certificates must accompany the trays for compliance audits and future maintenance .

Purpose of Marking

Marking ensures that:

• Installers and engineers can verify compatibility with project requirements.
• Safety and performance standards are maintained, reducing risks of electrical hazards, mechanical failure, or fire .
• Compliance with national and international regulations is documented, which is critical for inspections and audits .

Additional Considerations

• Cable trays are also specified in NEC Article 392, which outlines installation rules, grounding, fill limits, and separation requirements. While NEC focuses on installation, the markings on trays help ensure that the correct type and material are used for the intended environment .
• Manufacturers provide product data including rung spacing, inside depth, fitting radii, and cross-sectional properties, which are often referenced in the markings or accompanying documentation .

Conclusion

Cable tray markings are an essential part of compliance and safety, providing clear identification of type, material, load capacity, and standard adherence. These markings, along with technical documentation, allow engineers, contractors, and inspectors to ensure proper installation and long-term reliability of cable management systems .