> > Nie ma zakazu połączenia jednego z biegunów wtórnej strony ze stroną
> > pierwotną.
>
> Dla urządzeń klasy II? Oczywiście, że jest.
>

Norma 62368-1 (zastępuje 60950-1) punkt 3.3.15.3 oraz punkt 4.2.4

3.3.15.3
class II equipment
equipment in which protection against electric shock does not rely on basic
insulation only,
but in which a supplementary safeguard is provided, there being no provision for
protective
earthing or reliance upon installation conditions

4.2.4 Energy source classification by declaration
The manufacturer may declare:
- a class 1 energy source to be either a class 2 energy source or a class 3 energy
source;
- a class 2 energy source to be a class 3 energy source.
A neutral conductor is considered to be a class 3 electrical energy source.
A protective conductor is considered to be a class 1 electrical energy source.