Game on!

[Voicecoil]

OK, I see what you mean, I must have read it wrong. But I guess in an industrial setup you're not going to have a 30mA RCD, so similarly it's going to be a matter of working carefully.Anyway it's a lot less scary than 370V DC on the primary side of a power supply (or on the braking terminals of a VFD for that matter )
Interesting to hear you work on PMSM drives, what sort of power? I've only ever come across quite small PMSM's

I could have misunderstood but I think kitwin was making the point that, even with a good chassis earth, you will not notice if you have a short from line or neutral to the chassis.

It's not beyond the wit of man to make a circuit that detects that, if I have a spare moment I might just add one to my isolation transformer. Not that the current arrangement is anything more than temporary until the workshop electrics get sorted out (type F RCCB maybe?), but I can see it might have other uses.