Current stage: 20.99 Effective date: Dec 16, 2025
Next stage: CD Next stage date: Dec 31, 2026
Originator: IEC
Owner: TC 23/SC 23B
Type: International Standard
ICS: 29.120.40
PUBLISHED IEC 60669-1:2017 ED4
PUBLISHED IEC 60669-1:2017/COR1:2020 ED4
IN_DEVELOPMENT IEC 60669-1 ED5 20.99 WD approved for registration as CD Dec 16, 2025