Someone wrote:
Many people do not understand that 240V ........ no neutral

That's true.
Some of us even occasionally call the two legs of a 240 volt circuit,
"Phases"!
Which in North American residential service is most unlikely to be
true.
But let's not introduce that (phase) complication into a very unclear
original question; still lacking information.
I give up! Who's on first ...... etc.
:-) :-) :-)
BTW. The reason for the constant reference to 'North American' (which
seems to be a good working system capable as it is of supplying both
120 and 240 volts) is because in Europe and elsewhere a 240 volt
supply could very well be one 'hot' wire at 240 volts (50 hertz) and
one 'neutral' at around zero volts. But could also be (in some
systems) two leads, neither at a zero potential, neither really
considered to be a neutral but at 240 volts (50 hertz) with respect to
each other. However the two leads 'could' in certain systems be
'phases'. :-( :-(