double oven help

**paul777** · 19th January 2009, 10:10 PM

Hello all
Please can someone help
we have bought a new double oven it’s not coming for another 2 weeks but in the booklet it is a 30 watt oven
what I need to know will it run off the mains double sockets or will I have to run 8mm or 10mm cooker cable of a 45amp fuse ?
Many thanks paul

**m4tty** · 20th January 2009, 06:37 PM

30 Watt oven ????

U sure its 30 watt not 3kw is it a slow cooker or something?

**paul777** · 21st January 2009, 12:22 AM

thanks all sorry just found out it is a 4.8kw
thanks paul

**Rory** · 6th February 2009, 08:36 PM

Firstly you should go by the guide set out in the instructions by the manufacturer but if its not clear then you will need a seperate 6mm circuit for your oven protected by a 32A MCB.
It maybe possible to use a 20A MCB using 2.5mm cable but as I said you should check with the manufacturers guidelines first.

**paul777** · 10th March 2009, 10:58 PM

hello
just checked the main fuse box the old cooker cable is run off by a 32amp fuse
should i buy a 45 amp fuse if i use 6mm cable
many thanks paul
ops sorry !!!!!

**Rory** · 10th March 2009, 11:14 PM

Answer No,
Check the wattage of the oven in any case but you can work out the fuse size by dividing the wattage by 230v. For example a 6kw appliance would be

6000) / 230 = 26A therefore a 32A fuse would be plenty and dont worry if it works out more because diversty means you will hardly ever be using everything on the oven at the same time. Your average household double oven would be on a 32A mcb supplied by a 6mm cable in my experience but dont take this as they are all the same, as i've said check with your installation instructions first.
If you're doing any alterations to this circuit then the 17th edition regs state that this circuit must be protected by an RCD.