Some "230v" power supplies are designed for the US 240v system, where there are two "actives", with the centre tap of the "pole pig" transformer doing duty as common for both.
These often have two capacitors, one from each "active" to the metal chassis, which is at a virtual "zero-volt" point.
Such supplies will work perfectly well on Australian Mains, but the capacitors now constitute a voltage divider, with the chassis at around 115-125 v, depending on how close the "230v" spec is met by the Mains.
That doesn't sound right. As I understand it, if a product has a metal class it must be built in one of two ways: it has a plug with ground and the chassis is grounded, or it has a 2 prong plug and double insulation between anything live and the chassis, so the chassis is isolated. Never should there be caps from live to chassis if that chassis is allowed to float above ground potential.
Maybe not with modern designs, but my Drake SSR1 Communications Receiver back in 1977 was wired like that, & even in the 1980s/'90s, there were pieces of equipment made similarly.
I remember getting nice little "zaps" from the coax sockets of VCRs which had 2-conductor cables.
Even using a 3-conductor cable with the ground extended from the wall socket, there is a problem, in that the two capacitors I mentioned were often rated at 200v & sometimes as low as 160v.
All perfectly OK with the US 240v system, where neither of the "hots" are more than 120v above ground, but use it in Australia, & one cap has the full "230v" (sometimes up to 250v) across it, as there is only one "active" ("hot") conductor & Neutral is very close to ground potential.
The second cap is effectively bypassed by the ground to Neutral connection where the Mains enter the building.
Some North American equipment we used in TV work was also technically non-compliant to Australian standards because they had fuses in both legs of the internal Mains connections of the device.
Perfectly logical for the NA system but in Australia, one of those fuses is in the Neutral line, which is a "no-no".
They somehow slipped by---probably because they weren't "consumer equipment".