NF EN 50021:2000被替代
Electrical Apparatus For Potentially Explosive Atmospheres - Type Of Protection "n"
出版：Association Francaise de Normalisation
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.
Indice de classement: C23-521 Supersedes NFC 23 521 (09/2005)
NEN EN 50021:1999 - Identical
SS EN 50021 Ed. 1 (1999) - Identical
UNE EN 50021:2000 - Identical
I.S. EN 50021:2001 - Identical
DIN EN 50021 (2000-02) - Identical
BS EN 50021:1999 - Identical
SN EN 50021:1999 - Identical
DIN EN 50021 : 2000 - Identical
NEN EN 50021 : 99 C1 2000 - Identical
DIN EN 50021 : 2000 - Identical
BS EN 50021 : 1999 - Identical
I.S. EN 50021:2001 - Identical
