Cable size for two ovens and a hob from extension CU with 6mm supply

[JohnW2]

..... (As JohnW2 flagged, the 6mm is not RCD protected, so that will need sorting too). Thanks

Not just "not RCD protected" - seemingly also not protected by any fuse or MCB.

 

[SJRSJR]

Any thoughts please? If it should all be controlled from the same CU, I can’t see any alternative than 10mm running from the main cupboard, under the floor to the kitchen, up to the bedroom CU, and then 6mm cable (or two?) back down to the kitchen.

 

[thomp1983]

I think some pictures of the current setup at both units is probably a good idea

 

[EFLImpudence]

Why did they/you put the CU for the extension upstairs in the bedroom and not in the kitchen?

 

[SJRSJR]

Why did they/you put the CU for the extension upstairs in the bedroom and not in the kitchen?

Before my time. It’s in a cupboard and out of the way.

It’d be too much upheaval to replace the 6mm to the Extension CU, but 10mm could go under the ground floor to the kitchen. Bit messy to get it up to the Ext CU but not out of the question.

The cooker is currently gas and there’s only 2.5mm T&E down to the kitchen. Thanks.

 

[EFLImpudence]

It’d be too much upheaval to replace the 6mm to the Extension CU, but 10mm could go under the ground floor to the kitchen. Bit messy to get it up to the Ext CU but not out of the question.

Is that not a contradiction?
Why then can't you get a 10mm² to the extension CU and a 6mm² back down to the kitchen?

The cooker is currently gas and there’s only 2.5mm T&E down to the kitchen. Thanks.

Gas it is.

It's not quite how you first described it.


I don't know what to suggest apart from starting again.

 

[SJRSJR]

Is that not a contradiction?

I meant in the context of 10mm following the same route as the 6mm, but I can see how it gets there is irrelevant.

As you say it's 'start again' or find a way to get the 10mm up to the Ext CU and a 6mm down. But at least just the one 6mm! Thanks