Specifications of accessories for trough-type cable trays

Trough-type cable tray accessories include fittings, supports, and hardware designed to meet ANSI/NFPA, ASTM, and NEMA standards, ensuring safe, durable, and flexible cable management.

Types of Accessories

Trough-type cable tray systems use a variety of accessories to accommodate changes in direction, elevation, and support requirements:

• Bends and Elbows: Allow horizontal or vertical changes in cable routing while maintaining proper bend radius to prevent cable damage.
• Tees and Crosses: Facilitate branching of cable runs in multiple directions.
• Drop-Outs: Enable cables to exit the tray at specific points without disrupting the main run.
• Supports and Hangers: Include brackets, clamps, and hanger rods to secure trays to walls, ceilings, or structural beams.
• Splice Plates and Connectors: Join straight sections of trays, ensuring structural continuity and load-bearing capacity.
• Expansion Joints: Compensate for thermal expansion and contraction in long cable runs.

Material and Finish

Accessories are typically made from steel or aluminum, with finishes that enhance corrosion resistance:

• Hot-dip galvanized steel (ASTM A123) for durability in industrial environments.
• Zinc-coated steel (ASTM A653) or electrodeposited coatings (ASTM B633) for moderate protection.
• Aluminum for lightweight applications with lower load requirements.

Standards and Compliance

Trough-type cable tray accessories must comply with recognized standards to ensure safety and performance:

• ANSI/NFPA 70 – National Electrical Code for electrical safety.
• NEMA VE 1 & VE 2 – Guidelines for metallic cable tray systems and installation.
• ASTM A123, A653, A1011, A1008, B633 – Material specifications for steel and coatings.
• UL Certification – Ensures products meet safety and performance requirements.

Installation Considerations

Proper installation of accessories is critical for structural integrity and cable protection:

• Accessories must match the tray type, width, and load capacity.
• Supports should be spaced according to manufacturer guidelines to prevent sagging.
• Bends and elbows must maintain minimum bend radii to avoid cable stress.
• Expansion joints should be installed where thermal movement is expected.
• All components should be accurately scaled in submittal drawings for field verification.

Documentation and Submittals

For engineering and procurement purposes, manufacturers typically provide:

• CAD and BIM drawings for all accessories.
• Product data sheets detailing material, finish, dimensions, and load ratings.
• Installation manuals aligned with NEMA VE 2 guidelines. By adhering to these specifications, trough-type cable tray accessories ensure a safe, organized, and durable cable management system suitable for industrial, commercial, and data center applications .