wrote in message
...
On Tue, 15 Feb 2011 22:05:39 +0000
"Clive D. W. Feather" wrote:
Some years ago there was a very good post on uk.railway explaining some
of this. For example, third rail running rails need to be isolated from
earth to keep stray voltages away from underground pipes, but 25kV AC

I didn't know that about 3rd rail, I assumed the rails were grounded.
Doesn't
that mean that there's a potential risk of electrocution just from the
running
rails?

... and any exposed metalwork on a train. I believe this is one reason why
you won't find metalwork on a platform that's within reach of a train. Where
this is unavoidable the metalwork is bonded to the running rails. Richard
Catlow used to be the source of all knowledge about this subject.

--
DAS