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531.3.1.202

"It is not permissible  to introduce an external connection for the purpose of intentionally creating a residual current to trip an RCD."


What problems, hazard or danger will ignoring this regulation create?


Z.
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  • Zoomup:
    gkenyon:

    Such a current would be applied downstream of the RCD. If the RCD trips, or is used as a point of isolation, and the arrangement tries to apply current, you are left with a current which might have nowhere to go except the person to whom additional protection is being offered, or whom the isolation was intended to protect.


    Yeh but it is such a tiny current originated through a big, erm, high value resistor.


    Z.




    It only takes a tiny current ... we are discussing mA. What is the safeguard if the resistor fails?


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  • Zoomup:
    gkenyon:

    Such a current would be applied downstream of the RCD. If the RCD trips, or is used as a point of isolation, and the arrangement tries to apply current, you are left with a current which might have nowhere to go except the person to whom additional protection is being offered, or whom the isolation was intended to protect.


    Yeh but it is such a tiny current originated through a big, erm, high value resistor.


    Z.




    It only takes a tiny current ... we are discussing mA. What is the safeguard if the resistor fails?


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