Current stage: 20.99 Effective date: Dec 23, 2025
Next stage: CD Next stage date: Aug 31, 2026
Originator: IEC
Owner: TC 15
Type: Technical Report
ICS: 29.035.01
PUBLISHED IEC TR 60893-4:2014 ED2
PUBLISHED IEC TR 60893-4:2014/AMD1:2017 ED2
IN_DEVELOPMENT IEC TR 60893-4 ED3 20.99 WD approved for registration as CD Dec 23, 2025