Quote Originally Posted by jaypee89 View Post
The floating earth appears to be by design, All the standard expected earths are connected together on a terminal strip mounted inside the cabinet. The actual earth from the supply is connected to the neutral points on the system. It's a 3 phase no neutral system.
That's an interesting comment about the capacitors leaking to earth, something I can test further with
That doesn't sound right.
The standard earths should be earthed, as that's safety critical.

I'm not sure why you'd earth the neutrals on a non-neutral system, or even why they'd have a neutral if it's a no-neutral machine.
Are there any transformers in the machine to isolate/step down voltage for anything?