A 90-degree bend in a cable tray is a fitting that allows cables to change direction at a right angle while maintaining organized, safe, and efficient routing.

Definition and Purpose

A 90-degree bend, also called an elbow, is a component used in cable tray systems to redirect cables at a right angle, either horizontally or vertically. It ensures that cables follow a controlled path without sharp kinks, which could damage insulation or reduce performance. These bends are essential in complex installations where cable routes must navigate around walls, equipment, or other obstacles .

Types of 90-Degree Bends

• Horizontal Elbows: Redirect cables along the same plane, turning left or right.
• Vertical Elbows: Change the elevation of the cable run, moving cables up or down.
• Material Variants: Available in metal (steel, aluminum) or PVC, depending on environmental and load requirements .

Construction and Installation

For metal trays, a 90-degree bend can be fabricated by marking the tray, cutting and relieving the inner flange, and bending the tray to form the elbow. A gusset or reinforcement may be added to maintain structural integrity . For PVC trays, the bend can be formed by cutting relief slots along the inner flange and carefully bending the tray, sometimes using heat for controlled shaping . Pre-manufactured bends are also available, simplifying installation and ensuring compliance with standards.

Benefits

• Cable Protection: Reduces stress and prevents damage to insulation.
• Organized Routing: Keeps cables neatly aligned and accessible for maintenance.
• Space Optimization: Allows efficient use of available space in complex layouts.
• Safety and Compliance: Minimizes electrical hazards and meets industry standards such as UNE-EN 61537 . In summary, a 90-degree bend is a critical component in cable tray systems, enabling safe, organized, and efficient cable routing while accommodating changes in direction or elevation. Proper selection and installation of these bends enhance both the longevity and reliability of electrical installations.