Installing a cooker, help!

[JackSmith]

ok, so i've came a cropper once again.. when the small oven switches on the RCD controlling the main board trips, and the main oven doesn't even come on.. I'm assuming this is nothing to do with my connections as i would just trip all the time, not when the oven is switched on? any advice guys?

 

[Evans Electric]

At this distance, can only assume that the oven has a fault. Either L-E or N-E or you have put the cooker cable neutral in the wrong neutral bar.

Oh just seen you have an RCD main Switch. Have you made the connections in the cooker correctly ?

 

[JackSmith]

Well, it was just a 3 terminal terminal block, my mate called me and said it was the main mcb tripping, but it wasn't it was the RCD, i'm guna go around on monday and checking my connections is going to be first on my priority, is there anything else it could be? would it mean ther is an internal fault with the cooker?

 

[Evans Electric]

It could well be an internal fault, dis. your conns and try the RCD again. Also look closely at the terminals in the cooker, most are foreign made and the symbols are not always as obvious as you would expect.

 

[JackSmith]

well, that's the thing, if the cooker switch is on, and the cooker is on.. it doesn't trip, the cooker clock etc. are on, it's just when the small oven gets turned on it trips, the more i think of it the more it sounds like an internal fault with the cooker, and the main oven doesn't even come on!

 

[Janice]

because thats they way the cooker designer has rated the productplug and play

so are we saying to ignore the manufacturers instructions and use 4mm

does that not invalidate the manufacturers warranty ????

shower/rcd thread comes to mind :^O

i wonder if theses designers ever read the regs ??

Nice one, Theory.

Did you know that computer techies understood P&P to mean plug and pray? :^O :^O

J.

 

[green-hornet]

There should be a sequence of tests you can do to establish the cause.

Firtly disconnect and do a r1+r2 on the cooker circuit.

Establish polarity at this stage.

Then do an insulation test all done whilst disconnected from the oven.

Reconnect at the breaker and do Zs and RCD trip times.

I would do a ramp test to see how sensative the RCD is at this point.

If all these tets are ok the only other reason for the tripping would be the cooker itself.

This could be in the wiring on double ovens you do get multiple methods of connections.

Live would be bridged etc as would neutral, check you have connected for the correct power.

I have a portable appliance tester for such problems, it shows to the customer the failure of the appliance, and the reason why.

 

[Andy™]

if its only when a certain element is used, it could be a faulty element with high earth leakage

 

[JackSmith]

ok, thanks.. im assuming it's the cooker the way it keeps triopping when the small oven comes on and the large oven won't even come on, and they had it in the shed for atleast 2 months before i installed it, which is a contributing factor me thinks?

 

[Theorysparky]

ok, thanks.. im assuming it's the cooker the way it keeps triopping when the small oven comes on and the large oven won't even come on, and they had it in the shed for atleast 2 months before i installed it, which is a contributing factor me thinks?

the cooker is knackered end of

if it has been in the shed more 2 months then there is a fair chance a rodent has moved in !!!!!

as GH says if the tests are ok then its the appliance...

 

[Andy™]

sheds are usually unheated and there is a good chance that it has damp inside from being there so long

 

[green-hornet]

Yes I would expect damp to have got into the elements, they are prone to it when installed never mind being stored in a shed for three months.

Sorry but it looks like you will have to get a new cooker.

 

[Andy™]

Or... if its a damp element... remove RCD and run at full heat for 5-10 mins to dry it out. if it still trips RCD after this. replace it (the cooker, not the RCD!)

 

[Evans Electric]

Beat me to that one , Andy my thoughts exactly.

 

[JackSmith]

ok, thanks alot for that guys!