|
Posted by Tony Miklos on June 6, 2008, 2:34 am
Ralph Mowery wrote:
> <Frank> wrote in message
> is better conductor than gravel when wet. Sand and gravel by itself
>> (dry, that is) are excellent insulators, not good for ground. If you go to
>> a major electrical substation you often see gravel all around, especially
>> around the fence lines. Its a good insulation and could prevent you form
>> electrocuted.
>
> In most places gravel is placed instead of grass. There is very little
> upkeep on it. Just squirt it with some roundup to keep the grass out.
>
> It has nothing to do with insulation.
I never thought of this before but the gravel/insulation idea sounds
like it could very well be true. If they wanted minimum upkeep the
entire area would be on one single concrete slab, but they don't do
that. Inside the fenced area's you will find many different concrete
slabs with gravel in between them.
Check out the photos on this site.
http://www.fotosearch.com/photos-images/substation.html
Every one that shows the base has separate concrete slabs and gravel in
between. You can zoom in for some nice closeups. I learned something
new today. Thanks Frank!
Tony
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap