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as long as the smallest cable is protected by the fuse/MCB then its ok, you can go up and down cables sizes as many times you want,

my son-in-law had a tesla charger fitted and the same thing happened (RCD tripping) it turned out to be a faulty RCD, they got a them cheep , they knew they were bad but fitted them anyway, then waited for them to fail

100% right this is the best way , but this way takes skill, not a job for a DIYer , i was surprised the first one I fitted , cant remember all the instructions , but it did say something along the lines of" connect all pipe work to valves, then crack open pipe on one side and vent for so many...

some come pre-charged with gas and you purge the pipe work with some of this gas, the pipe work is fixed length for this to work,

these is not a closed book questions,

it could be the Darwin effect, just the same as there are old and bold but no old bold,

us busy everyday electricians,( I like that) should not be getting shocks(unless its a tax bill) as we all practice LOTO, don't we? as the old saying goes, don't stick your finger where you wouldn't stick your ....(I have forgot how that ends) but I do know you don't forget you first

too late ,now he's completed the job and gone, £150 for 10 circuits(£15 per circuit) not too far off the norm, but if he has completed in 1hr did he do a complete inspection and test?, I would think not

this is the black art of electricians, pass this and you can enter the inner sanctum of the junction box or check this web page https://www.chegg.com/homework-help/questions-and-answers/question-4-small-office-consists-following-single-phase-electrical-loads-connected-380v-th-q97131890 i am...

yes, from the consumer unit should be fine, but why do you want to do this? and why 10mm? the unit has electrical equipment in the cabinet would have an earth connection in the mains plug if they needed one, a lot of stuff now is double insulated and does not need an earth,

always thought a half-round file is a good allrounder

does that not make it just more efficient than other heating appliances, rather than a generator?

Yes to all above but in Q2 its. b) Long vertical runs,

if you added another main switch then you should have fitted another Neutral bar , I do have one question how are you going to meet the isolation requirements?(SOLO) I do like this, but maybe a 4 pole not 3 pole

yes, why not? , as long as you do it correctly

this does not look like a UK set-up, all the blacks and blues ( I never knew that is what a RCD was called a CDC/differential circuit breaker) the Double pole MCB's will help find the fault, are the hob and oven on the same MCB?

whats a CDC?

I agree with binky, your best bet is a big employer, they have to pay a levy if they don't have apprentices, this one of the reasons I think it a broken system,

did you fix it?

I agree