Current stage: 20.99 Effective date: Apr 17, 2026
Next stage: CD Next stage date: Dec 30, 2026
Originator: IEC
Owner: TC 62/SC 62B
Type: International Standard
ICS: 11.040.55
IN_DEVELOPMENT IEC 62563-4 ED1 20.99 WD approved for registration as CD Apr 17, 2026