heads up; OSI Challenger 1P - test-drb@ccmp.vtda.org

19 Apr 1999

Be carefull doing this.  All foreign 240 mains that I have worked with have
been 240 between hot and neutral.   This works out to be 416 phase to phase
on 3 phase systems.   What you will be doing is 240 between 2 hots.  This
can and will cause problems with a lot of supplies that expect the neutral
to be at / near ground.  I have several isolation transformers that I use
for all the UK equipment I service and they all are wired for 240 Hot to
neutral output.

Also be careful what electrician you get to set it up for you.  I have seen
plenty of them manage to wire them wrong.  I have even had to explain to
them how to wire a buck / boost transformer only to have them fuse it for
isolation ratings.

...
 Here's how I'm avoiding this problem for my
collection: I'm moving into a
new house and getting 220 installed where my stuff it going to be
located.. since it's right where the breaker panel is, it's not going to
cost much at all... so if the computer in question is going to be located
in a basement or wherever the breaker panel is, you don't even need a
transformer... just get an electrician, friend, or do it yourself..

Kevin