31 Jan
2011
31 Jan
'11
4:29 p.m.
All,
On 01/02/2011, Chuck Guzis <cclist at sydex.com> wrote:
On 31 Jan 2011 at 12:05, Simon Fryer wrote:
It's been 240/120 V in the USA for years. The voltmeter on the
outlet next to my system here says that the line voltage at this
outlet is 122 volts.
I was assuming you were getting two phases from a three phase system.
Tony seems to indicate that the two legs in the US are from a centre
tapped transformer, so you would be getting 220/240V.
[more scary US distribution wiring]
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh
On 31/01/2011, Brian Lanning <brianlanning at
gmail.com> wrote:
In the
US, two separate 110 legs are delivered to the house. When
we need 220, the magic of constructive interference is applied, and
we get 220. The 220 is delivered to the appliance as two separate
110 wires, a neutral wire, and sometimes a separate ground wire for
safety.
This doesn't look quite right to me, but it is probably close enough
for most applications.