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Re: [TCML] comments on designing a lightning protection system
In a message dated 6/9/08 8:00:01 P.M. Eastern Daylight Time,
>>What's the *best* possible conductor to use to
>>channel lightning? Heavywall large-diameter silver pipes braided into a
>the best possible conductor is one sized to carry the load while able
>to provide a low impedance path to the ground point.
That sounds like the most "adequate" or "economical", not the "best".
And I haven't seen in any of the links below where "the load" is
defined. How can you engineer a lightning protection system if you don't define the
parameters of lightning? It would seem that a truly professional installation
would include statistical data about historical lightning in the area, and
what level of lightning the system would be designed to protect against (to
what degree). How do the contracts read?
>From a canadian source here is one example:
>[quote] In general, lightning protection systems grounding is done using
>copper or aluminum cables and ground rods, 1/2 inch copper or
>copper-clad steel, 5/8 inch galvanized steel or copper plates. Rods
>should be spaced to allow down conductors to be run down a building to
>the ground electrode as directly as possible. A metallic underground
>water system may be used for both electrical and lightning protection
>grounding. The lightning protection grounding should always be
>interconnected with a metallic water system if available outside the
Hmmm, that "metallic water system" is usually "galvanized steel pipe"... ;)
>Lots of info here on grounding done for a 911 center in Florida.
Well, the "copper.org" people would certainly advocate copper conductors...
Mentions that hollow braided copper cable. Wonder if that stuff would be
suitable for monster TC primaries. Maybe a bit hard to tap!
>Interesting look at grounding from a HAM perspective.
I'm glad I'm not a HAM - protecting those lightning-magnets looks like a
Copper ribbon seems to be popular.
Center for the Advanced Study of Ballistic Improbabilities
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