Lightning conductor; ground wire; safe distance
Lightning conductor, also known as lightning protection needle, is used to protect buildings, tall trees and other devices to avoid lightning strikes. A lightning arrester is installed at the top of the protected object and connected with the specification wire and the underground leakage net buried in the ground. Lightning rod specifications must comply with the GB standard, each lightning protection category required lightning rod height specifications are different.
Lightning rod ground wire safety distance is divided into 3 categories: one type of lightning protection building is 30 meters; two kinds of lightning protection building is 45 meters; three kinds of lightning protection building is 60 meters.
When the thunder discharge close to the ground when it makes the ground electric field distortion. At the top of the lightning rod, the formation of local electric field concentration space, to influence the development direction of the lightning discharge, leading to the lightning arrester, the grounding wire and a grounding device of the lightning current into the earth, so that the protected object against lightning.
