For a commercial shop, I would honestly have the PoCo supply 480/277 3ph in, then the customer has the option of running lighting, equipment, HVAC, etc. At 480 to reduce circuit sizes from that of what would be required for the same equipment at 208.
With 480/277 coming in, you can still have 120/208V 3ph, you just need to add a transformer and a 120/208V 3ph Panel with a main disconnect to the secondary on the panel.
The one thing I will say is OVERSIZE your main disconnect / main service panel, whether you go 120/208 or 277/480... It is more costly with an initial investment, but definitely worth it in the long run.
I have been working on a commercial/industrial project for 3+ years now and the customer has outgrown the A and A services on site by repeatedly adding and adding with very poor planning for future needs.
Bassically, If you plan on needing 400A of load, throw in a 800A or A service unless you are absolutely sure that your calculated loads will NEVER be added upon without a complete rebuild of the building & electrical service.
Just my two cents.
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Here's an example:
My home was provided with a three-phase supply when it was built in because the builder intended to install an electrical storage-heating system.
For more 3 phase power monitorinformation, please contact us. We will provide professional answers.
I bought the house before the heating system was installed and opted for an oil-fired system instead.
So, in my area, it's an option you can request from the power company if you have a specific need for it.
So far as I know, three-phase supply is commonly used for equipment that requires substantially more power than most domestic household appliances. Some industrial electric motors require a three phase supply. In my area a single phase is 230 V so domestic households almost always use only a single phase. I expect the phases are separated at the local substation where high voltage local distribution is reduced to 230 V.
For more information, please visit single phase smart meter.