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Yes, almost half the standard domestic supply... As has been rightly said before by Flameport, it's unlikely that it's the hot tub causing the lights in another property to flicker every few minutes (but not impossible I agree) Rather than focussing on the neighbours hot tub it would be more...

To inform them that they are employing cowboy electricians, since it is them who are responsible for said sub contractors work and that they are signing off on dangerous installations and leaving them in an unfit state.

Very lucky family there. Good job somebody with some brains was there to knock everything off in time. Could have been a far worse story if not. Just goes to show.

I always say that to the missus but she looks at me gone out like I'm an idiot each time...:p

Can also be as simple as the clutch wasn't aligned properly when fitted....

Flameport's comments appear to have been overlooked some what, but are very valid.

Im not saying you're not right B-A-S, I accept 100% what you are saying. I was just curious if you had ever seen it/come across the situation before. At the same time, I do feel that the problem with the OP is potentially something unconnected to the hot tub but unfortunately had coincided...

Do you know of anybody who has been "hosed" or if indeed an 11kw shower or similar has caused problems with the supply? And more to the point, do you know of anybody who has ever notified the DNO when adding said items? I've had a look through my T&Cs and can only find the following: "It is...

I have the details of said contracting electrician and company he was subbing for so may just contact the company to see what they say.

Not really. To be honest I'm peed off that a so called electrician would do this. Should be banned from electrical for life. If they're doing connections like that who knows what else they're doing (or not doing)

Please note the bit where I said "usually run off a single phase 240v 20 amp supply" I didn't say Always even at 32 amps, it's hardly a huge load when compared to other items available for installation on the domestic electricity installation of a property.

It could be, was it not for the Eco nimbies in charge nowadays.

Does anybody notify the DNO when they install 11kw showers? Which will be higher current than this hot tub set up is!!!

Luckily nothing went wrong.

No they didn't, cos the previous owner was my mother and she would not and has not touched the electrics. She had it installed and used it for its intended purpose.

I've removed an electric car charging point from inside our garage today. This was installed by a registered electrician who was subbing for the firm who supplied the charger (previous owner had it fitted not us). I have the certificate and report from the job. However, this is what greeted me...

Hot tubs these days (the type where it's a moveable (by crane or truck) and plonked on a concrete pad outside the house usually run off a single phase 240V 20amp supply as a maximum. For example, the "latest 7 seater hot springs,60 hydrotherapy jet, with 3kw heater and colour changing LED...

Does that matter? Last time I checked most houses don't have air conditioning installed and gas central heating doesn't provide cooling in summer either....

In between the two boxes I can just make out what look to be red, yellow and blue cables. This would suggest three phase. These boxes usually contain DOL starters for motors/pumps and can have a remote start stop button, or as already suggested they can simply contain contactors for other pieces...

Since you've already disconnected the cable at either end, simply choose which one you wish to use as live and neutral and wire it that way throughout the circuit. It ultimately doesn't matter with a lamp on its own. Just ensure that you wire the correct polarity from the plug to the dimmer...