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So, I guess the answer is yes it's needed at the house end as the ring main has a 32A MCB?

Hi, I have a detached garage (1x pir led sensor floodlight, 1x double socket and 1x light pendant inside) which has an electrical supply wired from the house left hand side ring main. It's wired using 2.5mm SWA mostly in the ground but the FCU (13A) is at the end of the SWA (in the garage) not...

I'm only thinking of changing it for arguments sake that 6mm is not capable of carrying 30A in some cases, and after working out diversity for the cooker and hob, they do not stretch anywhere near 30A.

20A could be a thought in that case, but will it not 'nuisance trip'? I will have a look into the insulation side of things. Even at worse case scenario would 6mm T+E be strong enough to be protected by a 30A breaker?

Regarding what I meant: I was looking through the 17th O.S.G at the current capacities for 6mm T+E and the capacities are very different depending on how the cable is placed within a wall. I'm sure that it is placed in conduit in the wall, but not entirely sure as this query is for someone...

Would it be entirely necessary? Also as I'm a little unsure how the cable is in the wall, I'm considering downsizing the breaker to 25A. I think it will be fine as upon doing the calculation for the cooking appliances the sum of currents comes out as 19.8A. Your thoughts?

I need to wire a ceramic hob and an electric cooker to the same cooker isolator. The hob is 6.6Kw and the oven is 2.85Kw, as far as I know the supply cable from the board to the isolator is 6mm t+e. The breaker is 30A. Can anyone tell me whether the supply cable is big enough for the two...