Metal partition for trough-type cable trays

Metal partitions, also called barriers or dividers, are solid, continuous components installed in trough-type cable trays to separate cables by voltage, type, or function, ensuring safety and compliance with standards.

Purpose and Function

Metal partitions in trough-type cable trays are used to: Separate cables of different voltage ratings or signal types to prevent electrical interference and maintain safety. Organize cables within the tray, maintaining proper spacing and routing for easier maintenance and inspection. Support compliance with electrical codes, such as ANSI/NFPA 70, NEMA VE-1, or IEC equivalents, which may require separation of certain cable types.

Enhance mechanical protection for sensitive instrumentation or control cables in industrial environments.

Material and Construction

Partitions are typically made of the same material as the cable tray, such as hot-dip galvanized steel, pre-galvanized mild steel, or stainless steel (grade 316L). They are solid, fixed, and continuous, extending along the tray length where separation is required. Edges are often painted or coated to prevent corrosion, especially near cut or punched areas.

Installation and Accessories

Metal partitions are supplied by the tray manufacturer to ensure compatibility with tray dimensions and fittings. They can be installed in straight sections, bends, tees, or dropouts to maintain separation throughout the cable tray system. Connectors, clamps, and hold-down devices are used to secure partitions and cables, ensuring stability and electrical continuity.

Expansion joints may require special partition fittings to maintain separation across building expansion points.

Standards and Compliance

Metallic cable trays and partitions should comply with NEMA VE-1 or equivalent IEC standards, ensuring mechanical strength, electrical safety, and corrosion resistance.

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E marking or UL certification may apply depending on the region, confirming adherence to safety and quality standards.

Summary

Metal partitions for trough-type cable trays are essential for safe, organized, and code-compliant cable management. They are made from the same material as the tray, are solid and continuous, and are installed using manufacturer-supplied accessories to maintain separation across the entire cable tray system, including bends and expansion joints. Proper selection and installation ensure reduced interference, improved safety, and easier maintenance.