Cooker Circuit

[Hawk]

Hi all, my first post! Well, I was called to a job the other night because the cooker was tripping the rcd. Didn't have an insulation resistance tester with me so i disconnected the cable supplying the cooker from the cooker connection plate turned it on and still the rcd was tripping.Any way i narrowed it down to the cable between the cooker switch and the connection plate. So called back today with an insulation resistance tester to check the cable and it was clear! I then connected it back up the way it originally was, turned it on and voila, it stayed on.

The circuit supplying the cooker is a 35A mcb and that is protected with a 100ma rcd. Any suggestions why this would have tripped?

 

[acvc]

"So called back today with an insulation resistance tester to check the cable and it was clear!"

What was clear? IR was good? Or it was clear that there was an IR problem?

 

[COLLY]

could have been a bit of damp around the cooker or sensitive rcd

 

[miner69er]

i think colly probably nailed it with damp. Twice i have been called out to cookers tripping the RCD in the c/u and both customers had the same fault.... They had just cleaned the hob and the gas igniter button had allowed water into the switch and causing fault to earth.
If only there were more people as keen on cleaning, i'd make a fortune!

 

[Guest123]

Possibly an element breaking down and on it's way out......could be it only does it at a certain temperature.

Did you try all the rings + grill + oven???