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Is there a problem with the same circuit with two phases and one zero?
You can change the switch control. If single-phase switch control is used, the power supply is common and the load sides are connected together.
If a three-phase switch is used, the neutral line on the power supply side and the load side is shared.
I think the latter is better, because the three-phase load can basically keep balance and reduce the burden of the zero line.
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