1. The ancient lightning protection device was called "Lei Gong Zhu". Leigong column is a lightning protection facility in ancient buildings. The wood used is mainly nanmu, lattice wood, pine, cypress and so on. They all have good conductivity.

Modern equipment is called "lightning rod". That is, the grounding metal bar system installed vertically at the top of the protected body to prevent lightning strike. "Lightning rod" consists of lightning arrester, down conductor and grounding device. The lightning arrester is installed on the frame and higher than the protected object, which is used to intercept the lightning strike and make it not fall on the object within the protection range of the lightning rod. Through the down lead and grounding device, the tip of the metal rod is used to discharge, so that the electricity carried by the cloud and the electricity on the ground are gradually neutralized, and the lightning current is released into the earth, thus avoiding the occurrence of lightning strikes.