[Gllug] Lightning - was Evolution won't fetch my mail (Help)

[Jim Bailey]

On Sat, Aug 10, 2002 at 11:26:09AM +0100, Chris Bell wrote:
> On Sat 10 Aug, Mark Preston wrote:
> 
> > 
> >    Surprisingly, the way that people die in a lightning strike is not a 
> > result of severe burns, as most people think, but because the electrical 
> > force shocks the heart into cardiac arrest and cuts off breathing by 
> > paralyzing the chest muscles.
> > 
> 
> 
>    There was a BBC programme in the Science Shack series which dealt with
> high voltages, sparks, and lightning. They used the National Grid test lab
> to demonstrate the screening effects of Faraday cages, lightning conductors,
> and the whole body woven stainless steel mesh protective clothing worn by
> engineers working on the live grid. The grid is AC, so they could draw about
> a 12 inch spark by holding a gloved hand near the conductor, which caused
> some tingling, but it was safe to grab the conductor as long as they were
> totally insulated from everything else (they used an insulated cradle
> suspended from a crane).

this is the documentary I was muttering about earlier, thanks for
reminding me of the name, a good series from what bits I have caught.  I
think the presenter is doing tax ads now for the IR.

Peace Jim


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