IEC 61229 pdf download Rigid protective covers for live working on a.c. installations 1 scope International Standard lEC 61229 is applicable to rigid insulating covers for live working ona.c.installations, including those described in IEC 60743. The barriers， having dielectric withstand which depends on the positioning clearance,areexcluded from this standard. 1.1Classes Six classes of covers,differing in electrical characteristics, are provided and...