Current stage: 20.99 Effective date: Sep 12, 2025
Next stage: CD Next stage date: Oct 14, 2026
Originator: IEC
Owner: TC 59/SC 59K
Type: International Standard
ICS: 97.040.20
IN_DEVELOPMENT IEC 60350-3 ED1 20.99 WD approved for registration as CD Sep 12, 2025