Replacing existing electric oven

[BruceM]

We have a ceramic hob with a separate electric oven beneath, both of which are supplied from a 30 amp cooker circuit from the domestic board. These were already installed in our flat before we bought it.

The Hob is hard wired to a cable provided for the purpose, and the oven has a separate plug-in supply from a point underneath the worktop.

We want to replace the oven with a new one which also requires to be hard wired. The question is - would it be sufficient to replace the plug-in electric point with a suitably rated junction box for the oven?

 

[Chri5]

No, the socket the existing oven is using can't cope with more than 13amp, it sounds like your new item will have a heavier load.

Check the makers site and find the watt / kw load divide by 230v for a figure that will give you the amperage.

 

[electronicsuk]

What is the electrical load of the new oven? It sounds like the circuit is already pretty heavily loaded - 30A is not a massive amount to feed a ceramic hob and oven.

If you're 100% sure that the 13A socket is fed from the hob radial and not directly from a local ring final circuit, then it would also be worth checking what size cable it's fed with. You may find that the original installer has used 2.5mmsq, in which case, taking away the overcurrent protection provided by the 13A fuse in the plugtop would potentially allow the 2.5 to be overloaded.

 

[BruceM]

I have checked the consumption rating for the new oven which is listed at 2.85Kw total.

Divided by 230v surely this only amounts to just under 13 amp if it were being used to full capacity ???

 

[electronicsuk]

I have checked the consumption rating for the new oven which is listed at 2.85Kw total.

Divided by 230v surely this only amounts to just under 13 amp if it were being used to full capacity ???

Indeed. Do the manufacturer's instructions specifically state that the oven must be hardwired to a 16A supply, or just that it must be hardwired? If the latter, the single socket outlet can easily be changed for a switched fused connection unit fitted with 13A fuse.

 

[Taylortwocities]

It may still be OK. What is the rating of the hob?