Opinions sought on if it's the oven or the circuit

Mr_Mink

Hi,

I'll try to keep this clear and succinct but it's pretty convoluted so apologies in advance if it gets messy.

It starts with our first house purchase back in March this year (big yay!), after the initial settling in we decided to treat ourselves to a roast chicken; here's where we hit our first trouble, after about 40 minutes (and an unusually large amount of steam compared to normal roast in our last house) the electric tripped. We quickly found that the issue was the circuit the oven is on since when we flicked the other circuits on one-by-one it was only the oven's circuit that re-tripped the whole lot. We could only then turn it back on after the oven had cooled right down.

First thought was that the oven was at fault, at it was partially correct, the element in it wasn't the original one and was too powerful and also the oven was supposed to be wired into a 13a double pole switched fuse spur outlet. We corrected both of these issues and things seemed to be better, we could do a whole roast (huzzah!). However, recently we happened to be running the washing machine at the same time as the roast was going (it's always the poor roast) and bang, the electric goes. The following week we had the washing machine running prior to the oven and it tripped even though both were not on at the same time. 

So from what I have seen online, the electric circuit seems to be set up entirely correctly (oven correctly wired in, on it's own individual circuit, only trips when the oven is cooking for a long time) so that points the finger at the oven. But, the oven itself seems to work fine provided no other appliances in the house have been used recently.

Now being a money saver, I'd rather get the right solution on the first try before calling an electrician and then being told I need a new oven or visa-versa.

I don't suppose I've said anything that makes it immediately obvious about where to start with this one? Or if there's any extra information I can offer that would help?

Thanks in advance.

grumbler

What exactly trips - MCB or RCD&?

What do you call "it's own individual circuit"?

marlot

As above, exactly what is tripping?

Kitchen appliances can often have a little leakage to earth.  I had a new build house where I could run any two of the appliances, but putting the dishwasher on when any other two were in use tripped the RCD.  Dishwasher with one other appliance was fine.

Mr_Mink

I'm pretty sure it's the RCD that's going, and I can only switch it back on if I switch of the Cooker.

I'm no electrician so I may be using wrong terminology (sorry about the confusion) but when I say circuit I'm referring the the row of switches (MCB's I think?) and presume that means the oven has it's own circuit (always happy to learn if I have this wrong).

I've attached a picture of our box just incase it helps clarify what I'm trying to describe.