Cable tray cover plates should be secured using specialized clips or clamps designed for the tray type and installation conditions.

Common Methods to Secure Cover Plates

1. Snap-On Clips: These are pressure-fit clips that snap onto the side of the cable tray and grip the cover. They are typically made from 304 stainless steel, offering corrosion resistance for indoor and some outdoor applications. Snap-on clips are quick to install, reusable, and cost-effective, making them ideal for areas where covers may need to be removed for maintenance, though they are less suitable for high-vibration environments .

2. Mechanical Cover Clamps: For more demanding conditions, such as exposure to wind, vertical installations, or high-vibration areas, mechanical clamps like PKP-SP1, PKP-SP2, and PKP-SPM1 are recommended. PKP-SP1 and PKP-SPM1 are screwed into position, while PKP-SP2 can be installed without tools. These clamps provide additional mechanical fastening and are suitable for perforated or mesh cable trays .

3. Bolted or Screwed Fasteners: In some installations, especially for heavy-duty or outdoor trays, screws or bolts may be used to secure the cover plate directly to the tray. This method ensures maximum stability and is often required by NEMA VE2 installation standards for certain environments .

Considerations for Choosing the Right Fastening Method

• Tray Type: Ladder, perforated, or mesh trays may require different clips or clamps. Perforated trays often use PKP-SP1 or PKP-SP2 clamps, while mesh trays use PKP-SPM1 .
• Environmental Conditions: Outdoor, high-vibration, or vertical installations require more secure mechanical fastening rather than simple snap-on clips .
• Maintenance Access: If covers need to be frequently removed, reusable snap-on clips or tool-free clamps are preferred .
• Compliance: Ensure that the chosen method aligns with NEMA VE2 standards and any applicable electrical codes for mechanical integrity and safety .

By selecting the appropriate clips or clamps based on tray type, environmental conditions, and maintenance needs, you can ensure that cable tray cover plates remain secure, safe, and code-compliant.