Crossy

Why did I immediately think of "melon-headed tourists" (we are talking about Phuket after all)?

https://www.intelligentliving.co/tribe-philippines-carves-scooters-wood/

A Purple Range?

Early? I see 3 empty cans by my desk

OK. "Leak" won't affect your energy consumption. TT is just a type of earthing system https://en.wikipedia.org/wiki/Earthing_system most of Thailand is now TNC-S with MEN but don't go trying to convert. You could try to get the building handy-person to clean up the connection to the building steel which ought to solve your problem. Otherwise just connect your earth to the water pipe and be happy. Very important - DO NOT connect to the pipe if it's part of the fire-suppression system (Yes, I know I'm repeating myself here).

OK RCBO - check That there's a wire running to the building steel at least means there's been an attempt to get a decent ground in there (how good does that connection look?). System would be TT, no apparent link N-E at the board. That your RCBO isn't tripping suggests that there isn't a dangerous leak, does that tingle go away if you link the existing ground to the water-pipe?

Give the man a banana!!! I admit it took me rather longer than it should have

So where is your electrical ground (that's not your water pipe) coming from? If it's actually floating (not really connected to anything) then you could be seeing capacitive coupling from a live wire or possibly the mains inlet filter of your desktop PC (or pretty well any modern appliance). 4.5V isn't going big enough to feel. Please post a photo of the distribution board with the lid off. Are you in a rental or do you own the condo? Note that while not ideal you could use the water pipe as a functional ground (IF it is NOT part of the fire suppression system) but you would need an RCD/RCBO for safety as the actual properties of that pipe are unknown.

But not for measuring a leakage CURRENT.

What are you using as the reference point for the 4.5V? (where is the other lead of your voltmeter?) It's 99.99% chance there's no problem at all, but could you post a photo of your distribution board with the lid off (care please). We need to see what supply connection you have in order to be sure if there's an issue or not.

You wouldn't like the stress of the job Bob, getting you gate kicked is nothing

Nah, "Bob Smith" isn't a very Swiss name.

A couple of off-topic posts have wandered into the abyss.

It also says she was divorced, so still no dowry payable.

A good clean and a gas check should be order of the day.

There is no flat 4 Baht / kWh rate, you will be on the tariff 2.1.2. Anyway, a Schneider 3-phase board, dependent upon the number of breaker positions, is going to run to 5-10k for the board, 150 for each single-phase MCB and 3-4k for your 100A incoming MCCB. Your sparks should be able to size the board for what you need and future expansion.

Indeed, if she's new and "undamaged", this lady was a granny!

Yeah, that was my understanding too.

It's not been 4 Baht per unit for a good while unless you are a very low user. https://www.pea.co.th/en/electricity-tariffs Note that the numbers on the above link do not include the FT (fuel tariff) which is currently 0.3972 Baht/kWh I did pick the wrong tariff for the calculator but even with the correct tariff you're looking at about 11,300 Baht per month and that's only going to go up.

So, viruses and vaccines now follow politics? I suggest the report linked in the OP is a load of dingo's kidneys (c)Douglas Adams https://en.wikipedia.org/wiki/Correlation_does_not_imply_causation

I think you are under-estimating your energy cost here. The S21-200TH is rated at 3010W, let's say 3kW for easy sums. 3 x 24 x 30days = 2,160kWh per miner/month. Feeding that number into the PEA bill-estimator here https://eservice.pea.co.th/estimatebill/# gives an overall cost of 15,300Baht per miner/month. Is it still viable at that level? How about mining other coins? By the way. Powering one miner with solar would need 70 x 340W (about 140m2) panels plus associated inverters and battery packs.