Crossy

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?

2 minutes ago, chickenslegs said:

Purple Range?

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.

17 minutes ago, Banana7 said:

I don't want to argue with you, but I disagree with your comment. My voltage sensor has proven to very valuable and effective tool when doing any electrical work.

But not for measuring a leakage CURRENT.

10 minutes ago, Banana7 said:

It is 4.5 volts in the ground line.

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.

40 minutes ago, gomangosteen said:

She was not a grandmother - as per the actual Reddit thread not the double translated and incorrect edition that was in OP.

 

The genuine article stated she had two nieces and one nephew who received gifts several weeks later.

 

The faux outrage continues!

 

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

33 minutes ago, scott1999 said:

Now this tariff would work well if you had solar but I don't have solar so I went with the flat 4 baht 

 

Crossy please may I ask one more question: How much should I pay for the three phase circuit breaker board?

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.

6 minutes ago, scott1999 said:

by 4 baht a unit

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.

12 hours ago, scott1999 said:

electric at 7,000 baht a month

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.

Running here: -

Just now, KannikaP said:

Being a bit thick on electricity numbers, surely a 12000 BTU A/C takes around 1200 watts which at 220volts means 5.5 amps. Why a 20 amp breaker please?

You size the breaker to protect the cable (2.5mm²) and to handle the potential start-up surge from a conventional A/C.

Modern inverter units don't have the surge but it never hurts to be future-proof in case your unit isn't big enough.

We wired all our A/C locations in 4mm² (on 20A breakers) "just in case" the additional cost was small.