40.20 Sep 11, 2026
PRVC Dec 4, 2026
IEC
TC 95
International Standard
PUBLISHED
IEC 60255-21-1:1988 ED1
PUBLISHED
IEC 60255-21-2:1988 ED1
PUBLISHED
IEC 60255-21-3:1993 ED1
IN_DEVELOPMENT
IEC 60255-21 ED1
40.20
DIS ballot initiated: 12 weeks
Sep 11, 2026
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