Lightning rods

In order to direct lightning harmlessly to the ground, lightning rods are typically fixed to an exposed part of a building or other tall structure.

Benjamin Franklin first devised lightning rods. Lightning rod is very simple – they’re just metal rods attached to the roof of a building. The rods may have a diameter of two centimeters (two inches). The plug is connected to a large copper wire or aluminum wire with a diameter of an inch or two. Nearby, an underground conductive grid connects the wire to the ground.

Providing a path to the ground for lightning current, lightning rod intercept this voltage. However, they do provide a direct path to the ground, preventing damage to your home from fire, explosions, and electrical surges that may occur when your home is struck by lightning.

It makes no sense why lightning rod (and the associated assembly consisting of a connection to earth and a ground rod) aren’t routinely installed on houses. Although some lightning protection system is incorporated into most high-rise buildings and other structures.

Rather than passing through the structure, where it could cause fires or electrocute people, lightning will preferentially strike the rod and be conducted to ground through a wire. Finials, air terminals, and strike termination devices are also called lightning rods.

There is a myth that lightning rods attract lightning. The truth is that they don’t! In a lightning protection system, a lightning strike is intercepted, and the dangerous electricity is discharged to the ground.

Many people are unaware of the purpose of a lightning rod. They mistakenly think they attract lightning. It is more accurate to say that lightning rods provide a low-resistance path to ground that can be used to conduct enormous electrical currents during a lightning strike.

For more information on lightning protection or surge protection, please contact us.

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