Sorry, I did think that he meant single phase. If 4 wire two phase is two
hots 90 degrees apart and two companion neutrals , I'm not sure if you need
to switch the neutrals too. Of course with three phase you must switch all
three.
Alan

"A closed mouth gathers no feet"


Is it possible to wire a 3 phase switch for two phase power?


Yes, but one lead of the two-phase line will not be switched, and that is
now a
no-no.