On 17/03/2019 09:22, Kevin H wrote:
New kitchen planning underway. Looks like we're going to replace a gas hob with an induction hob requiring a 32A connection back to the CU (photo he https://goo.gl/CGJfg3)

The CU is pretty old (1995 when the house was built). There is a spare position but on the non-RCD protected side. I assume using this slot would not be acceptable practice?

I've noticed that the current cooker is also on the non protected side of the CU, and given there is a combined isolation switch/13A outlet next to the cooker I was wondering if regardless of the need to add the induction hob this alone should be a reason to update the CU, as that socket isn't protected by the RCD? Ignore the water heater note - the immersion heater is no longer connected.

A final question. Any reason not to use 10mm on the 10m run to the kitchen? Hob and oven won't be sharing a circuit.



We ended up with three 32A runs : Induction Hob, Main Fan Oven, Combi
Microwave/fan oven. While the last one could, perhaps, have just
plugged into a socket on the ring main, the numbers were very close.

The extra cost of a new CU and a couple of cable runs (there was one in
place) was trivial in the overall price.

Personally, I'd not feel comfortable without having an immersion heater
as a back up. While we've not had many issues with our heating, not
having hot water for showers etc is a big issue.