This web page describes what a lightning rod is.
What Is Lightning Rod?
It is a metal conductor mounted on a building, or other structure, as part of a system to prevent the building, or other structure, from being damaged by the electrical energy in a lightning strike.
It is connected to earth; the lightning rod diverts the electrical energy in a lightning strike to earth.
The image below shows an house with no lightning rod (left) and a house with a lightning rod (right).
It routes the electrical energy in the lightning strike to earth via the green cable. The earth spike is a metal spike hammered into the ground (earth).
What is a surge protector?
Description of electrical surges
What is a power surge?
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