The purpose of installing a lightning rod on a building is to
The lightning rod also forms a capacitor with these charged clouds. Because of its sharp tip, the two plate of the capacitor is facing a small area, and the capacitance is very small, that is to say, it can hold very little charge. And it brings together most of the charge, so when there is more charge on the clouds, the air between the lightning rod and the cloud is easily broken down and become a conductor. Thus, the electrified cloud layer forms a passage with the lightning rod, and the lightning rod is grounded, and the lightning rod can lead the charge on the cloud to the ground, so that it does not pose a danger to the high-rise building and ensures its safety.
Objective: lightning rod, 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
Principle: in a thunderstorm, building over charged clouds, lightning and are at the top of the tall building on a large number of induction charge, due to lightning needle is pointed, so the electrostatic induction, the tip conductor always gathered the most charge. In this way, the lightning rod gathers most of the charge.
