[LINK] Idea for: Proposed power supply standard

[Tom Worthington]

At 02:00 PM 24/02/2007, Karl Schaffarczyk wrote:
>... Most of the talk with low votage had centred around the loss 
>associated with long run low voltage power. ... 24volts AC supplied 
>by a 1:10 transformer  ...

There is an industry in supplying low voltage lights and appliances 
for off grid homes. Have a look at the "12 Volt Shop", who also sell 
24V appliances <http://www.12volt.com.au/>.

But keep in mind that low voltage does not necessarily equal low 
energy use. A low voltage 50 Watt light use the same amount of power 
as a 240 Volt one: 50 Watts.

>Any appliance which needs 24V AC could plug directly in ...

You might consider 42V as this is the standard adopted for new 
vehicle systems <http://web.mit.edu/newsoffice/1998/cars-1007.html>. 
It was selected as it is about the highest safe voltage.

Power-Over-Ethernet uses 48 volts DC 
<http://en.wikipedia.org/wiki/Power_over_Ethernet#Currently_recommended_.28IEEE_802.3-2005.29>.

See also my "Energy and Water Saving" Bookstore: 
<http://astore.amazon.com/energy-water-saving-20/>



Tom Worthington FACS HLM tom.worthington at tomw.net.au Ph: 0419 496150
Director, Tomw Communications Pty Ltd            ABN: 17 088 714 309
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