To me totally looks like a "double isolation class 2" IEC 61140 combined with the IEC 60417 – 5018 symbol (Functional earthing; functional grounding), but does such thing exists in any standard? I couldn't find it in IEC 60417.
The negative output of the power supply is connected through a 10kohm resistance to the earth pin of the mains plug (or at least this is what i can measure from the ouside).
- Isn't this breaing the double isolation condition?
- Is the earthing there only for reference?
If that's the case, why bother with the 10k resistor?