Oven MCB problem

[kozzymodo]

Our built in single oven is plugged into the kitchen ring main (as recommended in the manual)

When it gets up to temperature it causes the MCB to break.

I have tried it on a different ring main and the same thing happens. Is this a problem with the appliance - ie buy a new one or a too sensitive MCB?

Many thanks in advance.

 

[breezer]

rating of oven and rating of MCB?

 

[kozzymodo]

Oven is 20A, rating of MCB 30A

BTW the oven did cause the MCB to trip occasionally when it was new, but has worked fine for around 2 years until now.

 

[securespark]

If it's 20A, it should NOT be plugged into a ring final.

Don't call it a ring main, you'll increase some folk's BP....

 

[GaryMo]

Our built in single oven is plugged into the kitchen ring main (as recommended in the manual)

Oven is 20A

Are you sure the manufacturers recommend a 13A plug top for connection to a ring final?

 

[kozzymodo]

Ooops, sorry, not sure of the rating of the oven. Followed the installation instructions very carefully and used a plug into a normal socket.

Looking on the internet it recommends a 13A fuse, so that is as fitted. Sorry for the confusion about that!

The MCB is still tripping though lol.

 

[GaryMo]

There should be a rating plate, sometimes it's located inside the oven where the door closes. Either that or look in the manual.

 

[kozzymodo]

Found the manual, it says a 13A fuse is the minimum required - this is fitted, into a 13A Socket unit.

there is a plate saying the rating 2.25kW or is this other info?

 

[ebee]

I never think an oven however small is best on a ring final & especially on the kitchen ring which can well be quite loaded anyway at certain times (just consider, washer, dryer, kettle to start with before we think of dishwasher, toaster etc etc).
However, it is allowed .
I`d be considering your oven might have slight damage and the heat of expansion causing a connection to touch the case perhaps

 

[luminaire]

When it trips the MCB does it do it on start-up or is it after its been on for a long time?

 

[GaryMo]

When it trips the MCB does it do it on start-up or is it after its been on for a long time?

From the original post......

When it gets up to temperature it causes the MCB to break.

 

[securespark]

Faulty element or stat?

Betcha don't have an RCD....

 

[luminaire]

When it trips the MCB does it do it on start-up or is it after its been on for a long time?

From the original post......

When it gets up to temperature it causes the MCB to break.

 

[securespark]

Yes, so like I said, faulty element or stat.

Possibly running to earth when either stat gets up to temperature or element expands in the heat.

 

[kozzymodo]

Quote - Betcha don't have an RCD....



Just looked at the fuse board and its the RCD that trips not the MCB.

Does this make a difference to the diagnosis?