What does 2xMOPP really mean

[foxr]

Hi there,

I am a student and I am designing a medical device that has a type CF applied part.

I know the specifications that the applied part must comply (4kV of insulation, 8mm of creepage, <10μA patient leakage current, 2xMOPP), but I don't understand what 2xMOPP means in practice. I know the definition is two means is patient protection and that it requires double insulation or reinforced insulation, but I don't know how to design a power supply that complies with that.

Does double insulaiton just mean I have to insulate the part twice? So can I use two isolated DC-DC converters (that don't provide 2xMOPP) that have 4kV of insulation in series?

Sorry if I seem a bit lost, but reading IEC 60601-1 isn't answering my questions.

Thanks in advance!

[Vovk_Z]

You don't have to design a medical-grade power supply if you are a student.
And, reading about 2xMOPP says 2xMOPP is not double insulation. It means double insulation and one more different safety means.