grill trips rcd

[ban-all-sheds]

In the first instance I would be tempted to conduct an experiment replacing the thermostat with a normal switch (taking all safety precautions including making absolutely sure that the oven did not overheat!!!)

But just in case, make yourself a Neapolitan pizza ready to take advantage...

 

[Taylortwocities]

You need an RCD tester and an insulation tester to properly analyze what is going on.

 

[NoSparks]

As evrything works ok if the thermostat contacts are closed before the live is connected

But I thought you said that the RCD tripped when the thermostat re-opened? ie it was only OK while the thermostat was closed.

Have you tried the experiment yet?

Do rcd operating values change ?

Not as far as I am aware. You can use an RCD for calibration purposes over a period of time implying that it does not change.

 

[NoSparks]

You need an RCD tester and an insulation tester to properly analyze what is going on.

You have a point. If there were an earth fault it should show on the insulation test.