Electrical – Is it safe to run a 220v “Split-Phase” piece of equipment on 220v “single-phase”

In most cases, the electrical company, supplies three-phase power voltage. A house is fed from one of these phases and the neutral, moreover, different houses in the same area are connected to different phases, but SHARE NEUTRAL.
The number of connected houses are arranged such that each phase has a load similar to the rest, that is, the load is balanced for the three-phase system.

There are other systems, such as two-phase (two phases and a neutral) but are of limited application in the world.

Writing my comment as an Answer (though it is not) as I do not have enough reputation (in electrical forum) to comment.

Last year I tried this by connecting R + Y + (reversed)B phases (R+Y-B) in series on the secondary of 3Ph Transformer.

As R + Y gives a vector exactly opposite to B, by inverting B we get -B in Phase with R + B. I simulated this at 210V using 3X3Ph Transformers and lamp bank.

As expected, I got single phase supply (with appropriate scaling) but got disappointed to see Unbalanced Phase currents on primary side. Later rechecking model on paper showed me that my idea was wrong. Primary being 3 Phase it will always load B Phase (which was reversed) unbalanced. Hence discarded the idea.