Hi Jess
One other thing you might want to consider, is if your shop is already wired
for 120/240 single phase the insulation on the present wire is probably not
rated for 480 service. 480 service requires wire with 600 volt insulation.
This would not be a consideration with 240 three service.
Travis
"Jess" wrote in message
...
Hi all,

I would like some help / advice in outfitting my shop.

For the first time in my metalworking home shop, I am able to get 3
phase service from the local power company.

In the past, I have always used a 3 phase rotary converter that I
built with the help of the group here - special thanks to Fitch and
Bob Campbell.

My question is, which voltage should I specify - and why?

I can get 208v, 220v or 440v.

What are the pros and cons, if any, between the choices?

My lights and shop equipment are all multi-tap wired and are capable
on running on any of the voltages.

I do have some small bench top and hand held machines that require
110v single phase.

I have one lathe powered by a 200v three phase motor - I would be
willing to replace this motor, if it would seem to be an advantage to
go with one of the higher voltages for other reasons.

I have hopes of going to some newer machinery in the future, most /
all of it seems to be rated for 220v, but with the notation that it is
operable on 208.

Your help and advice on this is greatly appreciated. Thanks in
advance,

Jess