What is the minimum clearance that open top cable supports should provide above ceilings?

The minimum clearance that open top cable supports should provide above ceilings is 75 mm. This requirement is important to ensure that there is sufficient space for proper ventilation and to prevent any interference or damage to the cables. Adequate clearance helps avoid issues such as overheating, which can result from insufficient airflow, and reduces the risk of physical damage from other objects that might be placed in the ceiling space. This clearance also ensures compliance with safety standards and codes that guide the installation and management of cabling systems. The specified distance of 75 mm is a recognized standard that contributes to the overall health of the cabling infrastructure.