Vertical deviation: ≤3mm per meter. Must be level, plumb, and securely mounted on supports. Use dedicated splice plates and bolts. Ensure firm electrical continuity through grounding jumpers at each connection point. Sharp edges or foreign debris inside the tray must be. What materials are available to make a watertight penetration through the top of a concrete pull box for a vertical run of cable tray? In practice, is it preferable to use PVC conduit with rubber pipe sleeves? My preference is to exit horizontally and use a ninety to go vertical. It is much easier. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Vertical penetrations are weathertight openings where pipes, ducts, cable trays and any other building ancillaries enter or exit a building through a wall. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. SLIPSIL Sealing Plugs are an ideal solution for the fire-safe, gas and / or watertight sealing of penetrations carrying single or multiple pipes.