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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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  • 0
    The spike from a fridge motor actually really is the motor - until the metalwork starts to spin and can generate a bit of back EMF, the full supply voltage sees the static impedance of the motor windings - which a quick flick of the ohm meter will reveal is quite low. (up to speed and the windings see the differnce between the supply and the self generated voltage.)

    All DOL motors do this but the fridge compressor is slow to get going against the opposition of the pressures in the refrigeration loop. So the inrush is high, and the duration is quite a bit longer than you may expect.  (things like fans are the opposite - the opposition to rotation at low speed is almost non-existent.)

    The capacitor is just there to provide a phase shift to the starter winding, to make 2 phases out of one.


    Mike
Reply
  • 0
    The spike from a fridge motor actually really is the motor - until the metalwork starts to spin and can generate a bit of back EMF, the full supply voltage sees the static impedance of the motor windings - which a quick flick of the ohm meter will reveal is quite low. (up to speed and the windings see the differnce between the supply and the self generated voltage.)

    All DOL motors do this but the fridge compressor is slow to get going against the opposition of the pressures in the refrigeration loop. So the inrush is high, and the duration is quite a bit longer than you may expect.  (things like fans are the opposite - the opposition to rotation at low speed is almost non-existent.)

    The capacitor is just there to provide a phase shift to the starter winding, to make 2 phases out of one.


    Mike
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