However, when a new plug has to be fitted (for whatever reason), how are we supposed to proceed ... ?
Carefully!
As we are generally talking about medical products then we should be making no modifications. Clearly cutting off a moulded plug and replacing it with a rewireable one would be considered a modification. So if you were going down this path you had better be sure you can stand up in court and say your "modification" is as safe as the original.
In any case fitting a ferrule crimp to the multi-stranded wires is going to be an absolute certainty!
