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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
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    davezawadi (David Stone):

    I don't think that is quite right Graham because a number of older models use a single thyristor, and provide the motor with half-wave rectified DC.  This is fine for a universal motor, provides speed control, etc, but could give "DC" faults.


     


    Hi David, yes, I remember those washing machines that could vary half speed to full speed - early '70's.


    You'd have a job to put those on a circuit with other appliances, supplied by 30 mA RCD, because the noise filters were 10 mA leakage. True story about this type of machine ... the one we had when I was a kid, was connected to a socket-outlet behind the machine. Over time, the earth pin on the plug became corroded due to humidity in the kitchen, so the "leakage" couldn't go anywhere. The way we found out about that, was hearing my Mum scream - she had stripped off late one night and put her clothes in the machine, bent over to pick up something else, and got a nasty belt from behind - due to the large protective conductor current available at the [not very well earthed] machine ... | OUCH !


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  • 0
    davezawadi (David Stone):

    I don't think that is quite right Graham because a number of older models use a single thyristor, and provide the motor with half-wave rectified DC.  This is fine for a universal motor, provides speed control, etc, but could give "DC" faults.


     


    Hi David, yes, I remember those washing machines that could vary half speed to full speed - early '70's.


    You'd have a job to put those on a circuit with other appliances, supplied by 30 mA RCD, because the noise filters were 10 mA leakage. True story about this type of machine ... the one we had when I was a kid, was connected to a socket-outlet behind the machine. Over time, the earth pin on the plug became corroded due to humidity in the kitchen, so the "leakage" couldn't go anywhere. The way we found out about that, was hearing my Mum scream - she had stripped off late one night and put her clothes in the machine, bent over to pick up something else, and got a nasty belt from behind - due to the large protective conductor current available at the [not very well earthed] machine ... | OUCH !


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