IEC 60601-1 is a standard for medical devices. It describes which are the requirements for the Means of Operator Protection and Means of Patient Protection, the current leakages and so on. I don't understand which are the standard cables/cords that can be considered having 2 x MOPP up to 250Vac.
Electronic – How to choose a cable /cord, connected to mains part, that is compliant with IEC 60601-1 3rd ed.
mainsmedicalstandard
Best Answer
I can't speak for medical but to pass regulatory you need to make sure each part of the AC mains system has a certification. The power supply has to have the IEC60601-1 Certification (XP power has some good medical grade supplies with medical certifications.) The line filter\fuse box will need to be certified. Any of your own harnessing will need to follow creepage and clearance distances AND have a sufficient wire size and insulation. Your application may require isolation, so then your power supply will have to be isolated and you will have to incorporate this into you design.
Usually with the IEC standard they will tell you one thing and it applies to another section, they are really difficult to read and even the regulatory companies don't know all of the standard. (I had a regulatory tester try and certify an industrial product under a residential testing process, we had to convince them that ours was industrial)
The goal is to pass regulatory, they will check your design. You will probably want to start working with them now, they might charge you to answer questions, but it's better to change your design now than have it fail regulatory. Find some help for your specific type of device either from a consultant or somebody who has been through the process before. Either that or buy all of the certification documents (they are expensive, and can be a few hundred a piece.) then read them 10x through. Usually you need to make sure all the components you buy have the appropriate certifications.
Edit: I was looking through a power supply guide for an unrelated reason and I found this (Power Supply Technical Guide 2010/11).
From page 84: