Re: O/T Question - What are the purpose of lightni

Posted by KEB on April 05, 2007 at 20:12:37 from (72.19.170.5):

In Reply to: Re: O/T Question - What are the purpose of lightni posted by Gary Schafer on April 05, 2007 at 08:58:23:

Gary, good description except for one point. Rods don't "attract lightning" as one would normally think of an attraction. There is a high probability that a lightning leader will attach to a grounded rod before it attaches to a lower portion of the structure (the so-called cone of protection under a lightning rod), but this effect is on applicable over a small distance. That's why you see multiple rods on buildings - if the spacing of the rods is too great compared to how far they stick up above the structure, theres a good possibility that lightning can attach to the structure between rods.

Keith

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