hey Brother cool

Yo yo man, YOU will be fried when touching the wrong cable, not me, brother...

////// Leakage current is hardly a problem ,they said their purpose to keep chasis floating is to enable atleast two earth faults for the system to trip and the system should work even with single earth fault .\

Please don't feel offended brother, but you don't even know about the most elementary rules of safety!!!

To 'enable at least two earth faults' does not mean, that you can omit one. It's a description of concept of DOUBLE ISOLATION, which is the key in working with saftey class II products. If you omitt one of these two isolations and a person is hurted or even killed, you will be put into prison, brother.

/////// Yea thats it . I will use TEFLON(R) screws at the bottom or a plastic chassis . \

Also it's not allowed to achieve double isolation by the help of isolation screws. Why? Screws could be exchanged by normal screws with a service check. Then, concept of double isolation is violated, brother.

Brother, know what happens, if a person touches bus chassis when going into bus or leaving it, when bus chassis shows some dangerous potential relative to earth? Yo yo man, this poor brother will be fried! So, brother, bus chassis must be absolutely isolated from everything having contact to high voltage power supply, even if this happens only via leakage currents!

Whether you can anything connect to bus chassis depends on safety standard in your country. If anything is connected to bus chassis, parts doing this like DC/DC converter must also comply to this safety standard. So, brother, tying anything to bus chassis is highly critical and must comply with safety standard. And I will do the hell to give you any concrete recommendation, as long as I don't know about this safety standard.

Understood me, brother?

Kai