Current stage: 30.99 Effective date: Apr 24, 2026
Next stage: TCDV Next stage date: Oct 30, 2026
Originator: IEC
Owner: TC 91
Type: International Standard
ICS: 31.180 31.190
IN_DEVELOPMENT IEC 63609-1 ED1 30.99 CD approved for registration as DIS Apr 24, 2026