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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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    6203b236b90ea53d2caa1b04b6c16e73-huge-20190503_140131.jpg


    b062246520594eda0ec405541582115a-huge-20190503_140146.jpg

    I'm doing a new installation labour only,  this afternoon I unpacked one of the new Hager CU that they have bought for me to install.


    The is the first CU I will fit with SPD and it's factory fitted, not quite in the way I was expecting , I thought it needed a MCB upfront of it and I wasn't expecting to see it connected into the main switch as it is.


    I have just read the guidance from Hager on testing the RCDs, I won't be testing them at 50 mA x 5 as my Megger RCDT320 doesn't have a 50 mA setting, I will have to try 500 mA X 0.5 and see what happens.


    It will be a few weeks before I do any live testing as the suppliers meter has not been installed yet to power anything up.


    Andy 


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  • 0
    6203b236b90ea53d2caa1b04b6c16e73-huge-20190503_140131.jpg


    b062246520594eda0ec405541582115a-huge-20190503_140146.jpg

    I'm doing a new installation labour only,  this afternoon I unpacked one of the new Hager CU that they have bought for me to install.


    The is the first CU I will fit with SPD and it's factory fitted, not quite in the way I was expecting , I thought it needed a MCB upfront of it and I wasn't expecting to see it connected into the main switch as it is.


    I have just read the guidance from Hager on testing the RCDs, I won't be testing them at 50 mA x 5 as my Megger RCDT320 doesn't have a 50 mA setting, I will have to try 500 mA X 0.5 and see what happens.


    It will be a few weeks before I do any live testing as the suppliers meter has not been installed yet to power anything up.


    Andy 


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