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VFDs mainly

Why do you keep blithering about SPDs, they have been around and in use for decades. You being ignorant to their use is your own problem.

Is it for temporary events? BS7909 may apply

A simple google search will show you their goals and motivations. How you came to that conclusion is anyone's guess. 

So you cant comply with BS5839-6 with Nest then. Not that many electricians bother issuing the right paperwork for fire alarm installs.

https://www.electrium.co.uk/media/20171130143632_0_224019 Wylex SNC RCBO (Web).pdf

I'd probably kick the report back too if someone sent me it on forms 8 years out of date.

If at any point you could be considered to be giving professional advice you should have Professional Indemnity, this includes literally every time you design a circuit.

Hopefully a fire extinguisher is strapped onto the post too since rolec rcbos love to melt

Its hardly new people have been making this up with Click Minigrid for years, we usually just run the whole bathroom off the 3A to eliminate the risk of the S/L remaining live easy enough to do, 3C+E to the switch 1 core for the permanent live 1 core to send the switched live back to the fan iso...

Split the tails before the RCD, install one S type for the main supply and one for the outbuilding. Id probably go 3 core SWA and drop a extra rod as long as the separation distances are fine

I didnt pay for it so im happy enough but yeah when you open the box and look at it it does look like something thats been knocked up in a shed

Theres nothing complicated inside them(This is the GARO EVSE Tester) it basically allows you to test the actual operation and safety features of the charger.

Single insulated must be in containment and may require de-rating. Specific regs? come on youre supposed to be an electrician why dont you start in chapter 4

Probably want to be looking more to 60204/60079 for guidance in this situation rather than BS7671, there are plenty of 24V connectors that are Ex rated not cheap tho(nothing Ex is) 

Its a potential shock risk the flex outlet plate is not suitable for the location and none compliant with the wiring regulations from those pictures. I'd suggest you contact ELESCA asap and get a electrician to make it safe in the meantime. I would not use the shower without the towel rail...

Its not "just cosmetics" and if the exisiting board is Schneider/Merlin by fitting another manufacturers device you may have introduced a device without the correct pollution degree for the area its installed in. Just fit the right thing and charge the customer accordingly.

Really is that why every floor i lift has them stuffed under it?

EICR always before a DB change where possible.

Oh dear yet another none compliant consumer unit, main earth should enter with the meter tails only minor but very common. Looks like a TT system @Murdoch so maybe a time delayed rcd although why he wouldnt remove it and just  fit a tails clamp that are easily availiable for CP Fusebox boards i...