Current stage: 20.99 Effective date: Nov 1, 2024
Next stage: CD Next stage date: Oct 31, 2025
Originator: IEC
Owner: TC 91
Type: International Standard
ICS: 31.180 31.190
IN_DEVELOPMENT IEC 63609-3 ED1 20.99 WD approved for registration as CD Nov 1, 2024