Not sure but glad I haven't been fitting this gear though.wonder if its the RCD side not tripping in time or not at all?
Didn't Someone have a problem with some Rcbo/rcds not tripping recently, thought I remembered a thread about it, wasn't they mk?
i don't usually fit them either. looks like a years worth of faulty ones.
From the date range given in the how to identify potential faulty items link its not actually a years worth of manufacturing. As they state week 31 of 2015 through to week 2 of 2016. Which is the last 23 weeks of 2015 and the first two weeks of 2016, (23 weeks) or just under 6 months worth. But it is potentially any MK RCBO's you've purchased since a year ago if your supplies have old stock hanging around.
Doc H
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