Current stage: 30.99 Effective date: Nov 7, 2025
Next stage: TCDV Next stage date: Mar 20, 2026
Originator: IEC
Owner: TC 21/SC 21A
Type: International Standard
ICS: 29.220.30
PUBLISHED IEC 63056:2020 ED1
PUBLISHED IEC 63056:2020/COR1:2021 ED1
IN_DEVELOPMENT IEC 63056 ED2 30.99 CD approved for registration as DIS Nov 7, 2025