Does the cable tray pass through the wall sleeve

Yes, a cable tray typically passes through a wall sleeve, which provides structural support and fire safety for the penetration.

Purpose of Wall Sleeves

A cable tray wall sleeve is a protective component designed to allow cable trays to pass safely through walls. Its main functions include supporting the tray, preventing damage to both the tray and the wall, and maintaining the integrity of fire-rated barriers when required . Sleeves are commonly made from durable materials such as steel or aluminum and are compatible with ladder, trough, and channel cable trays .

Installation Considerations

When routing a cable tray through a wall:

• The tray is inserted into the wall sleeve, which acts as a rigid support and ensures proper alignment .
• For fire-rated walls, firestop materials or fire-rated sleeves are used to maintain the wall's fire-resistance rating .
• In some systems, the tray may stop short of the wall, a sleeve is installed, and the tray continues on the other side. This method accommodates expansion and firestop materials while reducing stress on the wall penetration .

Safety and Compliance

• Wall sleeves help prevent fire from spreading through penetrations by meeting UL or other fire safety standards .
• Steel cable trays passing through sleeves can also serve as equipment grounding conductors, ensuring electrical safety in accordance with NEC 392.60 .
• Proper installation includes bonding, grounding, and using UL-listed or fire-rated sleeve systems to comply with building codes .

Summary

In practice, the cable tray passes through the wall sleeve, which provides mechanical support, maintains fire safety, and ensures code compliance. The sleeve acts as a controlled pathway, protecting both the tray and the wall while allowing for safe and maintainable cable routing .