On Wed, May 05, 2004 at 08:31:50AM +0100, Pete Turnbull wrote:
> On May 4, 19:11, Patrick Finnegan wrote:
> > On Tuesday 04 May 2004 17:54, Tony Duell wrote:
>
> > > There is no such thing as ground!.
> >
> > Sure, there is. It's the voltage potential present on a long
> > electrode inserted into the earth. :)
>
> Measured with respect to what? That wire dangling from your kite, Mr
> Franklin? :-)
Well from here... a kite would be a better ground than a two-mile-thick
ice cube!
I just heard a story this week about an astronomer here that is a definite
"head in the stars" type... some of his collegues asked him to run a ground
wire around the lab (our stuff, in the next building over, is all grounded
with 4"-wide copper ribbon). They came back from lunch, and all the cabinets
were connected with heavy gauge copper wire, which went through a hole in
the wall and stuck into the snow outside. Not so effective...
AFAIK, our ground is more or less referenced to the floor of the power plant,
and carried throughout the station in its infrastructure. I expect that for
outlying buildings, like where my experiment lives, they have to run a ground
wire out along with the 4160V feeder line. I hope it's big! :-)
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 05-May-2004 08:00 Z
South Pole Station
PSC 468 Box 400 Temp -82 F (-63.3 C) Windchill -154.8 F (-103.8 C)
APO AP 96598 Wind 16.8 kts Grid 006 Barometer 675 mb (10816. ft)
Ethan.Dicks_at_amanda.spole.gov http://penguincentral.com/penguincentral.html
Received on Wed May 05 2004 - 03:04:54 BST