The circuit has a 30amp breaker in the CU and this has never tripped. There are two blanks behind the cooker, one for the hob and a spur off for the oven, these are fused with 13amps. I haven't checked the size of the cable yet, but I think the fuse would have gone, had there been too much juice getting through. The ovens both work but only to a certain temperature definately not to max, as you can put your hand in the middle of the oven and keep it there as long as you like, even when it's been on for an hour.
I will check the cable tomorrow as I'm at work right now (nightshift). If the cable was not big enough, would it not have fried and fused the 13 amp.
I'm beginning to think the oven could be faulty, It's only two weeks old, My wife put a Sunday joint in last week and it cooked but took a very long time. That was the first time the oven had been used.
anymore ideas ?
thanks for your help