Cable Tray Storage Regulations

Proper storage of cable trays is governed by standards such as NEMA VE 1, CSA C22.2, IEC 61537, and NEC Article 392, ensuring safety, durability, and compliance during handling and installation.

General Storage Guidelines

Cable trays must be stored in a clean, dry, and level area to prevent damage, corrosion, or deformation. Metallic trays, such as steel or aluminum, should be protected from moisture and corrosive environments, while nonmetallic trays (fiberglass or plastic) should avoid prolonged exposure to direct sunlight or extreme temperatures to maintain structural integrity (Cable Tray Institute, NEMA VE 1) . Trays should be stacked on flat surfaces with adequate support to prevent bending or warping, and heavy loads should be avoided on top of stacked trays.

Handling and Protection

During storage and transport, cable trays should be handled carefully to prevent scratches, dents, or damage to protective coatings. Protective covers or wrapping may be used for long-term storage. Rung spacing and tray type should be considered when stacking to avoid crushing cables or fittings later during installation (ABB Cable Tray Technical Guide) . Ventilated trays should maintain airflow clearance, and solid-bottom trays should avoid stacking that could trap moisture.

Compliance with Standards

• NEMA VE 1 / CSA C22.2: Specifies requirements for metallic cable trays, including storage, handling, and installation. It harmonizes with the Canadian Electrical Code and provides guidance on load/span designations and tray modifications .
• NEMA FG-1: Covers nonmetallic trays, including fiberglass, and outlines storage and handling to prevent structural damage .
• IEC 61537: International standard for cable tray systems, detailing mechanical strength, corrosion resistance, fire performance, and ventilation. Storage must ensure trays are not exposed to conditions that compromise these properties .
• NEC Article 392: Governs tray-rated cable installations, emphasizing approved cable types, grounding, bonding, and fill limits. Proper storage ensures compliance with these installation requirements .

Practical Recommendations

1. Keep trays off the ground using pallets or supports to prevent moisture contact.
2. Separate different tray types and sizes to avoid confusion and damage.
3. Label trays clearly for easy identification during installation.
4. Inspect trays periodically for corrosion, deformation, or damage before use.
5. Follow manufacturer-specific guidelines for storage duration, environmental exposure, and handling (Legrand Technical Guide) . By adhering to these storage standards, engineers and contractors can ensure safe, compliant, and efficient installation of cable tray systems while maintaining the longevity and performance of the trays.