[GreenKeys] Australian Power cords.

[Harold Hallikainen]

Relying on a ground rod seems dangerous. If it is also grounding the
neutral into the house and the ground connection fails (or the ground just
gets really dry), the primary voltage (several kV) would be sent into the
house.

I grew up in California. There, PG&E would wire the pole transformer
primary phase to phase. When we moved to Denver, I found that they were
wired phase to neutral. In CA, there was no "primary neutral" running
between poles. In Denver, I was told that there is a neutral running back
to the substation. I don't see the advantage of having that extra wire.

Harold
https://w6iwi.org



On Thu, June 9, 2022 10:01 am, scottjohnson1 wrote:
> This was a common practice by the REA on farms.  One wire to the farm
> with a ground stake driven in the ground. Pole pig gave 115/ 230v.  Had
> it as a kid.Sent from my Verizon, Samsung Galaxy smartphone
> -------- Original message --------From: jim at k6ccc.org Date: 6/9/22  09:52
> (GMT-07:00) To: Greenkeys <greenkeys at mailman.qth.net> Subject: Re:
> [GreenKeys] Australian Power cords. From: "Michael Katzmann> The curious
> practice by Pepco (my utility) is they run 13 kV three phase> without
> neutral (three lines) on the top of the poles. They have a> transformer on
> the pole for every few of houses. The transformer has a> connection to one
> phase and one to an earth stake next to the pole. So the> return is
> through ground. I would have thought that this would be> unacceptably
> lossy but apparently not.That does seem a bit unusual, but with a good
> grounding system, you would be surprised what you can do with an earth
> return.Here in the western US there are two MegaVolt DC transmission
> systems.  One from the Los Angeles area to near Bonneville Washington,
> and the other from the California high desert to Delta, Utah.  Both
> operate normally with +500KV DC on one wire and -500KV DC on the other
> wire (1MV wire to wire).  These systems have capacity between 2,400 and
> 3,100 MegaWatts.  Both of them have the ability to operate with 700KV on
> one wire and use earth as the return in the event that there is a problem
> on one of the wires.  I will point out that the ground system is NOT a
> simple ground rod.73-----Jim Walls -
> K6CCCjim at k6ccc.org______________________________________________________________GreenKeys
> mailing listHome: http://mailman.qth.net/mailman/listinfo/greenkeysHelp:
> http://mailman.qth.net/mmfaq.htmPost: mailto:GreenKeys at mailman.qth.net>>>
> Jordan Spencer Cunningham's GreenKeys Search Tool:
> https://teletype.net/gksearch>>> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/>>> 1998-to-2001 greenkeys
> archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html>>> Randy
> Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.htmlThis list hosted by:
> http://www.qsl.netPlease help support this email list:
> http://www.qsl.net/donate.htmlMessage delivered to
> scottjohnson1 at cox.net______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>> https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive:
>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive:
>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to harold at w6iwi.org


-- 
FCC Rules Updated Daily at http://www.hallikainen.com
Not sent from an iPhone.