Cooker wiring query

[funboxster]

We're having a new kitchen installed at the moment which is going very well. However, I used to be an electrician although not now qualified to latest regs.
I noticed today after the Installers left that they are going to fit and wire our existing cooker tomorrow which is rated at 2.9kw, so will take 13 amps of current, via a 3 core & earth flexible cable, which looks like 1.5mm on a plug top onto the kitchen ring main, which is on a 32 amp RCD.

We had the consumer unit replaced on day one by a sparks working for the installers and there is a dedicated cooker RCD rated at 32 amps, and the previous 6mm cable has been reconnected and left under the previous location of the cooker with a JB.

Surely at the very least, the cooker should be wired directly to the cooker RCD, with a local isolation switch adjacent to the cooker?

The installers have been doing all the wiring, and the sparks is going to provide an electrical cert for the CU shortly.

Your comments would be appreciated.

[funboxster]

Thanks for the snide remarks guys. I should have qualified I packed up sparking over 30 years ago, fo a different career.

Upon further investigation last night, they've wired the induction hob, which is fitted with a 13amp plug, onto the dedicated cooker circuit, using the JB, what looks like 4/6mm cable and via a single socket outlet.

I dropped into conversation this morning my surprise you could wire an oven onto a ring main. The more approachable of the 2 guys said yes, because it was only a single oven. If it had been a double, they would have wired it onto the cooker circuit.

[funboxster]

Thanks for your constructive comments guys.

The single oven & hob are both Neff. The oven is 4-5 years old and I wired it in 6mm, as no fitted cable and plug, and played safe with cable size.

The hob is newish and Is fitted with a cable and moulded 13 A plug.

Thanks again.

[funboxster]

MikeStroud said:

I'm looking at a new single over and hob. The hobs I have seen all seem to need a 32A supply, which hob did you use that only requires a 13A plug?

TY

It's a Neff-bought last year- model number T40B31X2/GB. Probably has been superseded now. I checked the rating plate on the underside. Interestingly it doesn't quote the power consumption in watts, only maximum current use 13amp, so 3.1KW.

[funboxster]

Grandad Gaz said:

Alucidnation said:

Jesus.

Any cooking appliance over 2kw should have its own dedicated radial circuit.

However, many 4 burner induction hobs are now rated sufficiently, that they can be plugged into the socket outlet that was once used for gas hob ignition.

Some single ovens are rated at 16a, due to having a pyro clean function.

So to say it’s a only a single and can be plugged in, is incorrect.

now, why on earth didn't you say that in your first post, instead of trying to be a smart arse?

Nice one Grandad.

The single oven is rated at 2.9KW, the hob at max 13 amp, but no max power consumption in watts given!

[funboxster]

thebraketester said:

Well 13a at 240v is ~3kw

I was aware of that ,as per my earlier post. I still remember I=P/V, P=VxI, etc.

just making the point for some reason rated wattage hadn't been stated on the appliance.