On Sunday, 17 March 2019 09:22:12 UTC, 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.

Could you make the non-RCD side into RCDed? Might need to put 2 circuits into one MCB to make that work - I've not looked at your circuit layout but that's often entirely doable.

I'd expect a hob + oven to be ok on 32A due to diversity.


NT