It is unfortunate indeed that residential customers
cannot easily get three-phase power
--if you're a collector of vintage computer equipment
, you will find that some devices require three phase to run the fans
. Our old Digital TU78
tape drive needed it, for instance, and I know lots of other mainframes
and such needed it.
I have read about things you can use to convert two-phase to three-phase, but they're not for the amateur electrician.