NEN EN 50021:1999被替代
Electrical Apparatus For Potentially Explosive Atmospheres - Type Of Protection "n"
出版：Nederlands Normalisatie Instituut
专家解读视频
Defines requirements for construction, testing and marking of Group II electrical apparatus with type of protection "n", meant to be used solely in areas where explosive atmospheres of gas, vapour and mist are not likely to occur, or if they do, only infrequently or for a short time.
Supersedes NEN 3125. (05/2004)
SN EN 50021:1999 - Identical
BS EN 50021:1999 - Identical
DIN EN 50021 (2000-02) - Identical
NF EN 50021:2000 - Identical
I.S. EN 50021:2001 - Identical
UNE EN 50021:2000 - Identical
SS EN 50021 Ed. 1 (1999) - Identical
