How to test RCD for lighting circuit

[David427]

I live in Australia; you can use a socket tester to test the RCD for the power outlet circuit. Plug device to a 3-pin wall socket, set testing mA to 30 on the device and press test button.

What is the best way to test RCD on the lighting circuit – from an existing B22 or E27 lamp holder? (Not from the meter box end).

(I have seen B22 to 3Pin female converters, was not sure if that would work.)

Thanks …

 

[Rockingit]

The problem that you have is a lack of earth at the actual lamp point - either design is just Neutral and Active by that point which means you can't actually 'leak' earth from a device. You also don't (normally) have a Neutral at the switches either, just the switched Active so that also doesn't work.

Therefore, if your mission is just to know if the RCD in the board works, you'll need a proper RCD tester to fit onto the RCD device at the board. Because, also if you were to overcome the issues above, found a means of testing and it failed to trip you'd still be none the wiser if it was a faulty RCD or a fault in the circuit wiring that you had an incomplete Earth or Neutral fault somewhere.

 

[David427]

The problem that you have is a lack of earth at the actual lamp point - either design is just Neutral and Active by that point which means you can't actually 'leak' earth from a device. You also don't (normally) have a Neutral at the switches either, just the switched Active so that also doesn't work.

Therefore, if your mission is just to know if the RCD in the board works, you'll need a proper RCD tester to fit onto the RCD device at the board. Because, also if you were to overcome the issues above, found a means of testing and it failed to trip you'd still be none the wiser if it was a faulty RCD or a fault in the circuit wiring that you had an incomplete Earth or Neutral fault somewhere.

The problem that you have is a lack of earth at the actual lamp point - either design is just Neutral and Active by that point which means you can't actually 'leak' earth from a device. You also don't (normally) have a Neutral at the switches either, just the switched Active so that also doesn't work.

Therefore, if your mission is just to know if the RCD in the board works, you'll need a proper RCD tester to fit onto the RCD device at the board. Because, also if you were to overcome the issues above, found a means of testing and it failed to trip you'd still be none the wiser if it was a faulty RCD or a fault in the circuit wiring that you had an incomplete Earth or Neutral fault somewhere.

Appreciate the explanation, seems like a task for an electrician then?
Socket tester does basic wiring checks and indicates if all 3 wires are connected properly. Then I did the RCD test on one socket, to make sure RCD trips/works.
Is it necessary to do the RCD checks on all the power sockets or just one is enough?