Installation Method of Vertical Cable Tray Support

Vertical cable tray supports are installed using wall-mounted brackets, cantilever arms, or trapeze hangers, ensuring proper load distribution, spacing, and compliance with NEC and NEMA standards.

Key Considerations

Load and Span Calculations: Determine the total anticipated weight of cables and the tray itself. Support spacing must follow manufacturer load charts and NEMA VE 1 standards to prevent sagging or structural failure . Overfilling trays can lead to overheating and damage, so proper cable fill calculations per NEC 392.22 are essential . Material Selection: Choose materials suitable for the environment. Steel, stainless steel, or aluminum are common, with corrosion-resistant finishes for industrial or outdoor applications . Stainless steel (AISI 316L) is preferred in highly corrosive environments .

Support Methods for Vertical Runs

Cantilever Wall Brackets: These are mounted directly to walls and are ideal for vertical cable tray runs. Brackets must be securely anchored to structural elements and sized to handle the tray load . Trapeze Hangers: While typically used for ceiling suspensions, trapeze hangers can be adapted for vertical applications where multiple trays are supported in parallel. They provide even load distribution and allow for adjustments during installation . Channel Support Systems: For heavy or complex installations, channel supports (strut systems) can be used to mount vertical trays. These systems allow flexibility in positioning and can accommodate multiple trays or additional equipment .

Installation Best Practices

• Anchor Securely: Use appropriate anchors or fasteners for the wall or structural surface. Ensure compliance with local building codes and load requirements .
• Maintain Clearance: Allow sufficient space for cable bends, future maintenance, and heat dissipation .
• Use Compatible Components: Install trays, brackets, and fittings designed to work together as a system to ensure mechanical integrity and safety .
• Cable Routing: Plan the cable path to minimize bends and tension. Use rollers or pulling lubricants to prevent damage during installation .
• Inspection and Testing: After installation, verify that supports are level, secure, and capable of handling the intended load. Check for compliance with NEC and local codes .

Compliance and Safety

All installations should adhere to NEC Article 392, NEMA VE 1 standards, and relevant local codes. Only qualified personnel familiar with electrical installation practices should perform the work . Vertical supports must not be used as walkways or for personnel support, as this can compromise safety and system integrity . By following these techniques, vertical cable tray supports can be installed safely, efficiently, and in compliance with industry standards, ensuring long-term reliability and protection of electrical systems.