NEN EN 50021 : 99 C1 2000被替代
ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - TYPE OF PROTECTION "N"
出版：Netherlands Standards
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.
UNE EN 50021 : 2000 - Identical
EN 50021 : 99 COR 2000 - Identical
BS EN 50021 : 1999 - Identical
I.S. EN 50021:2001 - Identical
DIN EN 50021 : 2000 - Identical
NF EN 50021 : 2000 - Identical
NBN EN 50021 : 1ED 2000 - Identical
I.S. EN 50021:2001 - Identical
BS EN 50021 : 1999 - Identical
DIN EN 50021 : 2000 - Identical
SN EN 50021 : 1999 - Identical
