hi!
i've always wondered what phase-shift there is between those two 110V lines
in an USA 220V AC net system.

here we have either one phase of 230V or then 3 phase
with 120 degrees between the phases.
230V between phase to ground or 400V (third root of 3 times 230V of course)
between phases

everyone has direct 3-phase system with 230V to ground in every apartment or
house splitted up to equal load on the phases.

cheers
as


"Gary S."
On Sat, 05 Mar 2005 13:08:08 GMT, NoSpam wrote:

wrote:


2) Do modern refrigerators in apartments use ordinary AC sockets or
3-phase?

It would be an unusual residential apartment which has 3-phase AC
service of any kind directly incoming to the individual apartment.

Not just apartments, but few residences of any type get three phase
power.

In fact, people who want to have a shop with three phase power usually
need to have it added. The usual power setup for residences is what
you have described. 70-200 amp, 110VAC single phase is typical supply
for a home or apartment. The newer the contruction, the more amps in
the supply.

Happy trails,
Gary (net.yogi.bear)