Subject:  Re EMF-L building wiring
Date:     Thu, 24 Jul 1997 183637 -0500 (CDT)
From:     kriegerr@ix.netcom.com (Roy W. Krieger )
To:       Multiple recipients of list <emf-l@mail.llion.org>
--------------------------------------------------

You wrote:
>
>Hi everyone !
>Which are the differences between the USA building wiring and the
european one ?
>
>Ciao
>
>Andrea

The main difference is that in the US the standard voltage used inside
buildings is half that of what is used in Europe. In the US, the
standard voltage is 110-125V on each of the 2 charged lines in a 3-wire
system. The third line is neutral at ground potential and carries no
charge. Some heavy appliances such as air conditioners, dish washers,
etc., use both charged lines and thus operate at 220-250V. In Europe,
the standard voltage used inside buildings is 220-250V. Also, in the
US, the electrical frequency is 60 Hz; in Europe the frequency is 50
Hz. This difference produces a slight humming noise in high quality
audio equipment.

Hope that answers your question.


Archive provided courtesy of WaveGuide, http://www.wave-guide.org
Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html