Distance of cable tray next to side air vent

Maintain a horizontal clearance of at least 100 mm and a vertical clearance of at least 300 mm between cable trays and side air vents.Recommended ClearancesHorizontal Distance: Cable trays should be installed at a minimum of 100 mm away from ventilation ducts. In areas where airflow is critical, this distance may be increased to 150 mm or more to ensure proper ventilation and prevent overheating of cables .Vertical Distance: The top of the cable tray should be at least 300 mm below the bottom of the ventilation duct. This spacing allows for adequate airflow, reduces maintenance difficulty, and prevents interference between the systems .Additional ConsiderationsCable Support: Ensure that cable trays are supported according to standards such as NEMA VE-1/VE-2 or BS 7671. Proper support intervals prevent mechanical strain and potential damage to cables .Fire Safety: Use fire-resistant cable supports to prevent premature failure in case of fire. Avoid relying solely on non-metallic clips or ties for support .Airflow and Maintenance: Adequate spacing not only prevents overheating but also allows safe access for inspection, maintenance, and emergency situations .Environmental Factors: If the cable tray is solid-bottomed or installed in humid areas, consider drainage or weep holes to prevent moisture accumulation, which could affect both cables and ventilation efficiency . By following these guidelines, you ensure safe operation, proper airflow, and long-term reliability of both the cable tray and ventilation systems.