Re: OT. Lightning rod ???

Posted by RAB on June 17, 2006 at 09:34:02 from (195.93.21.42):

In Reply to: Re: OT. Lightning rod ??? posted by Illinois Boy on June 17, 2006 at 07:22:25:

Illinois Boy,
Thanks. Yes, I know I am right.
Just try to draw a spark potential on a Van der Graaf generator with a sharp, grounded conductor close to the sphere. You can"t get more than a feeble spark, if that, if the humidity is high.
Try with a similar sized sphere as the ground link and you should be able to draw a high potential spark across the gap. Just like lightning.
Look at the post. It says protector not preventer. Nobody needs to put a "new" hole (whatever that might be - always use old ones myself, or maybe it"s just "a hole") in a roof. Nobody needs to put a lightning rod on their house. Their choice. Their choice if it is there at all, their choice if it is on the roof or a separate pole. Their choice.
Having been involved in an industry using tons (yes, tons) of explosives, we HAD to have a lightning protector on the explosives magazine. Our 300ft chimneys also HAD to have lightning protection rods. They (the chimneys) did get strikes and the magazine never once.
It has long been a proven technology to prevent or minimise lightning damage. Your industry with the well insulated cables will, of course pick up capacitive high voltage spikes from a nearby strike or worse from a direct hit. Yes, the voltage will affect devices distant from the point and your damaged devices may well cause fires in adjacent buildings to the strike by destroying very sensitive ICs and the like in the electronics of telecoms devices. Yes, if there were no phone lines there would be fewer house fires. Yes, if there were no power lines there would be fewer fires. I could go on, but I think you should be able to see there is a use for lightning rods, even if they will not prevent all catastrophes. RAB

Replies:

• Re: OT. Lightning rod ??? Illinois Boy 12:32:23 06/17/06 (0)

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