cable tray standards, IEC 61537 latest edition, NEMA cable tray, UL certification, cable tray safety

International standards for cable tray design, testing, and performance have been updated in 2025 to enhance safety, load capacity, and material quality. The revised IEC 61537 (international standard for cable tray systems) introduces stricter requirements for static load, deflection, corrosion resistance, and fire performance, aligning with global industrial safety norms.

NEMA and UL standards have also updated testing protocols for galvanized steel, aluminum, and stainless steel cable trays, ensuring products can withstand extreme temperatures, chemical exposure, and heavy mechanical loads. For manufacturers and buyers, compliance with these updated standards is critical to accessing global markets and ensuring project safety and longevity.