A lightning rod (US, AUS) or lightning conductor (UK) is a metal rod or metallic object mounted on top of a building, electrically bonded using a wire or electrical conductor to interface with ground or "earth" through an electrode, engineered to protect the building in the event of lightning strike. If lightning hits the building it will preferentially strike the rod and be conducted to ground through the wire, instead of passing through the building, where it could start a fire or cause electrocution.
A lightning rod is a single component in a lightning protection system. Lightning rods are also called finials, air terminals or strike termination devices. The lightning rod requires a connection to earth to perform its protective function. Lightning rods come in many different forms, including hollow, solid, pointed, rounded, flat strips or even bristle brush-like. The main attribute of all lightning rods is they are conductive.
Copper and its alloys are the most common materials used in lightning protection.
Read more about Lightning Rod: History, Lightning Protection System, Analysis of Strikes, Aircraft Protectors, Watercraft Protectors, Risk Assessment, Standards, See Also
Famous quotes containing the words lightning and/or rod:
“I
Am found.
O let him
Scald me and drown
Me in his world’s wound.
His lightning answers my
Cry. My voice burns in his hand.”
—Dylan Thomas (1914–1953)
“Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.”
—Bible: Hebrew Psalms, 23:4.