Drill holes in advance before installing cable trays
Secure the cantilever brackets to the wall, ensuring they are perfectly level. Option B: Ceiling Suspension (Trapeze or C-Hanger) Drill holes into the structural ceiling. But before you lay the first tray or clamp down a single cable, you need a solid plan. en completely installed, without damage either to conductors or structural system use 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. 10- Concrete Drill Bit: This bit its size will depend on the size of the drop-in anchor. If the drop-in anchor's inner diameter is 10mm and the threaded rod's outer diameter is 10mm, the concrete drill bit will be 12mm.
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