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I obviously didn't look deeply enough. Still wondering about isolation though.

I was wondering if these devices guaranteed isolation of the low voltage side, but when I look up that part number it has a 220volt coil (?).

Isn't the clothing and footwear of the "victim" also a factor? We have metal supports carrying glazing on composite, (plastic) decking. My wife regularly complains of static shock when touching them, which I rarely experience.

Just get an installation inspection (EICR) done and then chat to the spark. No-one will be offended by being asked about items outside their scope. Some of the other items you list will be covered already.

Cars have gone the same way. Loads of unnecessary, (arguably useless) gadgets and more software than a space capsule!

Are you sure you can't get into it? I always start from the premise that it's been put together, so how?

I guess you have it across the mains supply to some appliance ? I think you have read the values correctly and answered your own question.

Quote - Upon inspection however, I found that a cylinder stat had been tied to the pipe leaving the boiler just before the circulation pump. There's also a cylinder stat on the hot water cylinder itself. Isn't the pump integral to the boiler, and on the return? There are good manuals...

Take care with the plate screws. Depending on age, the back box may be BA threads, screws supplied with your new switch will be metric. Mixing them can lead to disappointment.

No, I don't think so. Note definitions; Portable, to an electrician, is an item with a plug, to be connected by the user. The common use of portable is something designed to be easily moved around, which precludes storage heaters, tending to be big chunks of concrete or similar. You could buy...

Are you using the one storage heater which works? If so have you checked how much it's costing you? I suspect that, whilst you may be more comfortable, running the storage heaters would cost more than your portable heater. It would be worth having an electrician look at the faulty heaters. It...

There was the 1x0.044, as on top of your table, but I'm not sure how much it was actually used.

Well from your evidence either the led array or its driver is US. It's impossible to say if these can be individually replaced without details of make, type number, etc. Assuming the driver is in the head, not the column, then replacing the whole head will be the simplest fix.

Yes and no. Those are constant current drivers, which will automatically vary their output voltage, within the stated range, to achieve the 1200mA / 1000mA current through their load. If you use the 1000mA driver it will work with the led array you have but will be dimmer. I don't know how much...

Suggestion; 1 Remove everything you've added. 2 Have a local spark in to check it's all safe. 3 Stop messing with it. 4 Stop worrying.

I have wondered what happens when there isn't space. So far I've got away with just ignoring the requests to book an installation appointment but no doubt the pressure will increase eventually. My cupboard has a reasonably large board which I think is supposed to be just for the supply company...

Good point. Perhaps he's trying to block the RF to stop it reporting readings.😉

Who put them there? Why?

There are actually British Standards, under the umbrella of BS9000, setting out the requirements for quality control procedures. I agree that these are OTT for day to day domestic electrical installation work, but they are implemented in industry, especially in highly controlled fields such as...