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RCD Testing x5 150mA (or higher for Hager RCCB)

sparkiemike
Following on from John Peckham's recent post, I have recently installed several of Hager's consumer units with their new 100A 30mA Type A RCD (CD285U)


When testing the RCDs I noticed the trip times were much higher than previously experienced. Hager have said that RCCB needs to be tested at 250mA https://www.hager.co.uk/news-exhibitions-case-studies/18th-edition/updated-guidance-rccb-testing/97806.htm


In addition, if you have a Fluke you may notice that when carrying out a earth loop test (in no trip mode) the Fluke will fail to get a reading and trip the RCD. Apparently Hager have had a several reports of this and when I called could not explain it.
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    I have always assumed that pushing the test button on an RCD or RCBO injects a fault current of 30mA.  I am now wondering if that is so, and that it is actually 150mA


    David
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  • 0
    I have always assumed that pushing the test button on an RCD or RCBO injects a fault current of 30mA.  I am now wondering if that is so, and that it is actually 150mA


    David
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