How many lightning protection grounding wires are required at the bottom foundation of a petrochemical distillation tower?
Thread Content
How many lightning protection grounding wires are required at the bottom foundation of a petrochemical distillation tower?
Welded grounding is the best option; the number and size of the grounding electrodes should be compatible with those used in the company’s grounding system. Connection via wires should not be used. The grounding resistance should be checked to ensure it meets the required standards.
\"Code for Lightning Protection Design of Petrochemical Plants\" GB50650-2011: 5.2.3 When the tower body is used as a lightning receptor, there should be no less than 2 grounding points, which should be arranged evenly around the tower body; the spacing between the down conductors should not exceed 18 meters. The down conductor should be connected to the grounding lugs pre-installed on the metal base of the tower. Non-metallic objects or pipes connected to the tower, when located outside the tower’s own protective range, should be equipped with lightning arresters at appropriate locations for protection.