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Type A rcd . EICR coding ? etc

aligarjon
Hi Guys.   Not been on for a long time, just had a bit of a search and couldn't really find anything so thought i would ask and see what you all thought.


1.  Are we or will we be coding type AC rcd's if there are LED's or induction hobs, lots of electronics  etc  present.

2. How much DC leakage does it actually take to saturate an rcd and cause  problem?

3. How much does a standard LED lamp or induction hob  leak ?

If we test an AC RCD with no load and it's fine then re-test it with all LED lights, induction hobs etc turned on and it operates correctly could we then say that it is ok with a note on EICR  OR EIC if installing any of the above.  


Obviously also on an EICR if the RCD then doesn't operate with it all on it becomes a C2 ?


Any thoughts



Gary
Parents
  • 0
    It isn't just a matter of masking. I have a VSD which simply does not work with a type AC RCD (in a socket) - the moment I press the start button, it trips. That doesn't justify a code.

    Most probably unwanted tripping would have resulted in the owner making arrangements to get it working, so I would be surprised if this was part of a ECIR.

    Are we sure that these devices mask the RCD?

    I don't know, I can only go on the advice our industry provides, like this from the IET https://electrical.theiet.org/wiring-matters/years/2019/77-september-2019/which-rcd-type/ and this from Hager https://hager.com/uk/support/regulations-18th-edition/selection-of-rcd-types  There are also some good videos from E5 and John Ward on youtube. These would suggest that selection of RCDs is relevant.

    My understanding is that type AC RCDs will trip on a pulsating AC fault current, but they may not trip on a pulsating DC fault current? Type A RCDs should trip in the event of either occurring.

    Agreed

    How could the code for the presence of a type AC RCD be worse than the one for none at all? ?


    I would not look at it in isolation, other factors would be considered, so could be C2 or C3

     


Reply
  • 0
    It isn't just a matter of masking. I have a VSD which simply does not work with a type AC RCD (in a socket) - the moment I press the start button, it trips. That doesn't justify a code.

    Most probably unwanted tripping would have resulted in the owner making arrangements to get it working, so I would be surprised if this was part of a ECIR.

    Are we sure that these devices mask the RCD?

    I don't know, I can only go on the advice our industry provides, like this from the IET https://electrical.theiet.org/wiring-matters/years/2019/77-september-2019/which-rcd-type/ and this from Hager https://hager.com/uk/support/regulations-18th-edition/selection-of-rcd-types  There are also some good videos from E5 and John Ward on youtube. These would suggest that selection of RCDs is relevant.

    My understanding is that type AC RCDs will trip on a pulsating AC fault current, but they may not trip on a pulsating DC fault current? Type A RCDs should trip in the event of either occurring.

    Agreed

    How could the code for the presence of a type AC RCD be worse than the one for none at all? ?


    I would not look at it in isolation, other factors would be considered, so could be C2 or C3

     


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