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GFI Plug with a plastic earth pin

jcm
Well could I say (with foot in the mouth) that this masterplug attached to portable tools inserted  into a 13amp socket uses the human body ,or animal as the earth wire to trip the 10mA RCBO device in the event of an earth fault.( PRCDKB Non-Latching RCD Safety Plug).  Rated at 16A it also has a 13 amp fuse with BS 1363 marked on the pins side . I think myself that it is so sensitiive that there is no need for an earth connection.

PROTECTS AGAINST DAMAGING AND DANGEROUS POWER SPIKES: The RCD adaptor is non-latching, so the power needs to be reset after each use, making it ideal for the protection of home appliances

SAFE FOR HOME USE AS MANUFACTURED TO BS 7071 1992: With the one socket for

  connecting devices to the RCD adaptor

BUT could Mr pat really ask for £3 for pressing a test button. 

Regards

jcm 


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    You can see this plug (with plastic earth pin) on the Diamond stone cutter in Aldi store.



    So sounds like it might be an RCD plug dedicated to a double-insulated appliance. If so that doesn't seem unreasonable to me.

     

    I don't see how it can protect against spikes




    A double insulated appliance that desn't have a c.p.c. can't 'see' the voltage difference between line conductors and earth(*) - so a single SPD connected between L and N would provide all the protection it needs.


    (* OK it might be able to see the voltage difference between live conductors and true earth if it was left outside on the lawn or somesuch, but then I would expect the substantial plastic case to provide adequate separation)

     




    RCDs are specifically for occasions when a person, or animal, is the earth path.




    Just to be absolutely clear in case someone else reads this - RCDs can be used in at least two different ways (sometimes simultaneously) - firstly to provide ADS (usually where the earth loop impedance is too high for overcurrent protective devices to do the job) - in these cases the earth path is intended to be a c.p.c. (not the victim) and potentially allows disconnection to occur before any person or animal risks a shock; and secondly for additional protection where RCDs rated 30mA or below (but never higher rated ones) where the earth path may only be via the victim. UK wiring regs specifically prohibit relying on additional protection alone - it may only be used in addition to ADS (thus requiring a c.p.c. to be present) or some other equally effective measure (such as double/reinforced insulation) - and I would expect appliance standards to follow similar principles.


      - Andy.


Reply
  • 0

    You can see this plug (with plastic earth pin) on the Diamond stone cutter in Aldi store.



    So sounds like it might be an RCD plug dedicated to a double-insulated appliance. If so that doesn't seem unreasonable to me.

     

    I don't see how it can protect against spikes




    A double insulated appliance that desn't have a c.p.c. can't 'see' the voltage difference between line conductors and earth(*) - so a single SPD connected between L and N would provide all the protection it needs.


    (* OK it might be able to see the voltage difference between live conductors and true earth if it was left outside on the lawn or somesuch, but then I would expect the substantial plastic case to provide adequate separation)

     




    RCDs are specifically for occasions when a person, or animal, is the earth path.




    Just to be absolutely clear in case someone else reads this - RCDs can be used in at least two different ways (sometimes simultaneously) - firstly to provide ADS (usually where the earth loop impedance is too high for overcurrent protective devices to do the job) - in these cases the earth path is intended to be a c.p.c. (not the victim) and potentially allows disconnection to occur before any person or animal risks a shock; and secondly for additional protection where RCDs rated 30mA or below (but never higher rated ones) where the earth path may only be via the victim. UK wiring regs specifically prohibit relying on additional protection alone - it may only be used in addition to ADS (thus requiring a c.p.c. to be present) or some other equally effective measure (such as double/reinforced insulation) - and I would expect appliance standards to follow similar principles.


      - Andy.


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