Kitchen Change - 2 Ovens replacing 1 Double Oven

[WhiteCitadel]

Hi,

I am after some advice, I would make clear before I go into detail the work is being done by a qualified Sparky not me, Kitchen being refitted and the fitter has bought in his own electrician. NOT doing the work myself.

What I am being told on two ovens replacing one double does not match what I thought was going to happen, and wanted to ask here if I am wrong before I go back to discuss with him?

So existing kitchen outgoing had a double oven - 32A breaker on 6mm^2 from the CU. New kitchen has two ovens (well Standard Oven and Combi/Microwave both Neff) that the spec sheets for both state are rated 16A/3600W "connection rating" (no "real" power usage on spec sheet). 6mm came into usual 45A isolator then into an outlet plate.

I had (naively?) assumed that the existing circuit would service both the new ovens through the existing isolator with a dual connection plate, example:
45A Dual Appliance/Cooker Outlet Plate | Scolmore (PRW217) - https://www.tlc-direct.co.uk/Products/AA45DCOP.html

I am being told that really the ovens need separate radial form the CU, and re-using one of the two existing Fridge/Freezer (16A breaker/2.5mm on MCBO) for the second oven would be best (putting the fridge for example on the ring).

I have used the search quite a lot and it seems common that two ovens <16A would go onto a 32A 6mm circuit though with a dual outlet?

I don't really want to lose the separate MCBO circus for the fridge and freezer if I don't have to, but if regs say each needs its own circuit then it is what it is.

 

[mickegh]

There'll probably be no issue with the 2 appliances connected together

Theres very little hazard that could arise on the appliance cords and the appliances imo

 

[brianmoooore]

What do the manufacturer's instructions say, if anything, regarding the maximum fuse rating that their appliance can be fused at?
If they specify fusing at less than 32A, then this has to be adhered to for the installation to be compliant with the regs.
On a seperate point, why do you want the fridge freezer to be on its own RCBO? Sharing with a few regularly used sockets makes a failure much more likely to be noticed quickly.

 

[WhiteCitadel]

What do the manufacturer's instructions say, if anything, regarding the maximum fuse rating that their appliance can be fused at?
If they specify fusing at less than 32A, then this has to be adhered to for the installation to be compliant with the regs.
On a seperate point, why do you want the fridge freezer to be on its own RCBO? Sharing with a few regularly used sockets makes a failure much more likely to be noticed quickly.

The oven manual does say "fuse protection" now I checked it again.

Energy consumption per cycle forced air convection
(2010/30/EC): ...................................................... 0.69 kWh/cycle
Energy efficiency index (2010/30/EC): ................................81.2 %
Connection Rating: ............................................................ 3600 W
Fuse protection: ......................................................................16 A
Voltage: .........................................................................220-240 V
Frequency: ......................................................................50; 60 Hz
Plug type: .......................................................................... no plug
(electrical connection by electrician)

Freezer and fridge are already on dedicated RCBO (2.5mm radial) as the builder wired the house originally, its not that I want the Freezer on its own RCBO more than it is already, and in the past its been useful if the kids trip the ring with some escaped raisins in the toaster that the fridge and freezer are not on the ring.

I think it's already done that one of the RCBO circuits will be moved to the Combi/oven, and the original oven feed for the oven, as they are wrapping up the first fix today. I let them decide, as they are the qualified party, just not quite what I was expecting (but I get the argument that the appliance needs protection at its rated capacity).