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Specifications and terminology of cable tray elbows

Optical access and telecom site reference Published 29 Mar 2024

Use this reference to prepare product questions for CGWEB NETWORKS. Check interfaces, capacity, protection and installation requirements against the current product documentation.

Cable tray elbows are directional fittings used to change the path of cable trays, available in horizontal and vertical configurations, multiple angles, and various materials to suit industrial and commercial installations. Types of Cable Tray Elbows1.

Horizontal Elbows

Used to change the tray direction on the same plane. Common angles: 30°, 45°, 60°, 90°. Available in ladder, solid bottom, and perforated designs.

Rail heights typically range from 4" to 7", widths from 6" to 36", and radii from 12" to 36". 2.

Vertical Elbows

Allow cable trays to transition between different elevations. Configurations include vertical inside (concave) and vertical outside (convex) bends. Used to navigate around obstacles or structural elements.

3. Long Radius vs Short Radius ElbowsLong radius elbows: Radii of 12", 14", 24", 36"; reduce stress on cables and facilitate easier installation. Short radius elbows: Typically 3" or 6"; used where space is limited but may require careful cable bending.

Material Options

Steel: Galvanized or stainless steel for durability and corrosion resistance. Aluminum: Lightweight, corrosion-resistant, suitable for ladder and solid bottom trays.

FR

P (Fiber Reinforced Plastic): Non-conductive, corrosion-resistant, ideal for chemical or outdoor environments. Specifications and StandardsNEMA Classes: Class 1: NEMA 12B, 12C (1-1/8" side rail flanges)Class 2: NEMA 20A, 20B, 20C (2" side rail flanges)Class 3: Exceeding 20C (2 3/8" side rail flanges)Class 4: Heavy-duty 8" high trays (2 3/4" side rail flanges) for A820E systems. Fabrication: High-precision to maintain cable bending radius, structural strength, and electrical continuity.

Standards Compliance: ANSI/NFPA 70, ASTM A123, A653, A1011, A1008, B633, and NEMA VE 1 for metallic cable tray systems.

Additional Features

Cable tie-down holes: Often 3/8" for securing cables in long radius elbows. Push pins or splice plates: Ensure secure attachment and continuity across fittings. Compatibility: Designed to integrate with ladder, perforated, solid bottom, and channel-type trays.

Cable tray elbows are essential for navigating complex cable routes, maintaining proper bending radius, and ensuring safe, reliable cable management in industrial, commercial, and data infrastructure projects.

Specifications and terminology of cable tray elbows - CGWEB NETWORK INFRASTRUCTURE [PDF]

Specifications and terminology of cable tray elbows

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