when i turn on my electric oven the main fuse board trips?

if the RCD tripped out as soon as you switched it on at the wall then either the oven is connected wrong or it is faulty ie it has a fault to earth. if the MCB tripped out then then you are pulling to much load for the rating of the circuit breaker and probably the cable too. there is a rating plate on the cooker you need to check how much current the cooker will draw and fit suitable cable and protective device to control the cooker. I suggest you get an electrician to check it out.

mick
March 2010