Current stage: 40.99 Effective date: Aug 14, 2026
Next stage: DECFDIS Next stage date: May 31, 2027
Originator: IEC
Owner: TC 111
Type: International Standard
ICS: 13.020.30 31.020
IN_DEVELOPMENT IEC 63333-3 ED1 40.99 Full report circulated: DIS approved for registration as FDIS Aug 14, 2026