Current stage: 40.99 Effective date: Nov 7, 2025
Next stage: DECFDIS Next stage date: Nov 21, 2025
Originator: IEC
Owner: TC 23/SC 23K
Type: International Standard
ICS: 27.015 29.020
IN_DEVELOPMENT IEC 63552 ED1 40.99 Full report circulated: DIS approved for registration as FDIS Nov 7, 2025