My house had a new consumer unit fitted in 2005 it's partly fitted with RCBOs and partly with MCBs it was installed by the DNO who are SSE in this area bearing in mind the year it was installed are the rcd fitted likely to be electronic type or plain electromechanical ones I'm asking out of curiosity because if ever there's a fault in my workshop ( for this read that I make a mistake or an error when experimenting) usually the house RCD trips despite me having an electronic plug in one on my test bench supply which I think should fire first ide really appreciate your wise words on this thanks x Kelly
Installing a 10 mA RCD downstream of the 30 mA RCD won’t guarantee discrimination, but will make it safer.
If you are testing RCDs in your workshop or tripping a RCD or using a checkbox such as my Seaward box to test your RCD tester then you can make yourself a dedicated plug in adapter that will allow you to do your testing without tripping the RCD in the main consumer unit, obviously you will need to ensure that it is only used for its intended purpose.
Installing a 10 mA RCD downstream of the 30 mA RCD won’t guarantee discrimination, but will make it safer.
If you are testing RCDs in your workshop or tripping a RCD or using a checkbox such as my Seaward box to test your RCD tester then you can make yourself a dedicated plug in adapter that will allow you to do your testing without tripping the RCD in the main consumer unit, obviously you will need to ensure that it is only used for its intended purpose.
