Voltage class A definition

Voltage class A means a: Rated voltage  30 V AC; and Rated voltage  60 V DC."
Voltage class A means a: rated voltage ≤ 30 V AC; and rated voltage ≤ 60 V DC.
Voltage class A means the classification of an electric component or circuit as belonging to voltage class A, if its maximum working voltage is ≤ 30 V a.c. or ≤ 60 V d.c. respectively