Explanation of symbols in marks of conformity
In applying the CE mark to its products or packaging, a manufacturer autonomously declares that its products comply with certain European Union directives. The CE mark is not a mark of conformity in contrast to the VDE, ENEC or GS marks. It addresses itself only to the authorities responsible for monitoring the EU directive in question.
The GS mark (safety tested) assures conformity with the (German) Equipment Safety Act and is awarded by an independent testing authority. It may only be displayed in combination with the corresponding establishment authority mark, such as VDE, or Technischer Überwachnugsverein (TÜV).
ENEC (European Norm Electrical Certification) is the European mark of conformity for electronic products. It is awarded by neutral testing and certification authoristies in Europe. HTe test authority number for the test authority in question is displayed along with the ENEC-mark.
e.g.: ENEC 10 (VDE Germany)
The design and made of operation determine the protection class for electrical equipment. The scope of protection against electrical shock is described by three protection classes.
Protection class I:
electrical appliances for connection to electrical earth. The symbol is depicted at the conection point. Mobile applications are fitted with an earth contact type plug.
Protection class II:
electrical appliances with additional or double insulation. They do not require a safety connection to electrical earth.
Protection class III:
electrical appliances designed to be supplied from a SELV (Separated or Safety Exrta Low Voltage) power source.