help im baffled

[cymro]

installed an oven and hob total rating 8.2kw all wired with 6mm 2core and earth connected to a 40amp mcb it all works most of the time there has been a fault on the oven since installed.the cooling fan stays on permantly it is supposed to switch off after a while but hasnt repair man out soon to check that,a family meal has been done on this a few times and no problems last night the rcd on the main box tripped using the oven and 1 ring it went 3 times in succesion but not one of the mcb goes down .
tried it again today and all seems fine again except cooling fan as usual.
im baffled anyone got an idea cheers people

cymro

 

[deejay d]

why have you got the hob and oven on an rcd ?? do you have a split dis board or is your electrical supply via overhead cable because as a rule you never but them on a rcd because when an element is cold it can get damp and the moisture in side causes the rcd 2 trip,sounds like the oven is faulty 2 me

 

[securespark]

DJ

He just might even have an RCD incomer (like me). Then you have no choice (short of changing the board) whether it is RCD protected or not.

 

[cymro]

yes its an rcd incomer so no choice in the matter

 

[mapj1]

RCD firing on a cooker usually means water has got into the elements. Usually once dried out again it will be OK, at least until the sprouts boil over again.. If not then gently remove covers and give a wipe over to remove anything gungy from around contacts, and look for damaged metal tube casing of elements - possibly you can try and eliminate which element is the culprit, by switching rings/grill/oven in turn. I have in desperation tried drying out with gas torch, with temporary success for a few days, then replaced the element with a pinhole rusted through casing when the shops had re-opened after the hols. Just some thought to get you started. Don't rule out steam either I suppose.

 

[deejay d]

DJ

He just might even have an RCD incomer (like me). Then you have no choice (short of changing the board) whether it is RCD protected or not.

tt over head system.............

 

[andy]

DJ

He just might even have an RCD incomer (like me). Then you have no choice (short of changing the board) whether it is RCD protected or not.

tt over head system.............

or TT underground

 

[cymro]

apparently its a fault with the oven that zannussi know about they have ordered a part without coming to see it but will take a month or so thanks for all replies

cymro