Negative air ionizer with a electric net of 3X 230V AC
The 230v between the input pins will be OK, but the phase connection going to the 'Neutral grid' will not be, for safety, if anyone can touch the grid.

You could fix the safety aspect by making the unit completely enclosed, so there is an insulating grid preventing contact with the neutral grid.

In practice, it may be safe enough to put another two 10M resistors in series with the neutral grid to limit current for personal use, but that doesn't meet the letter of safety regulations so cannot be sold, and really you would not want to allow anyone other than you to touch if you did so.