I have no arguments with your comments except to clarify my initial statement on 3 phase supply wrt 3ph kWH meters..

The 3Phase kWH meter is always 3Ph4wire

However u don't need to pull in all 4 wires (3 phase voltages and the Neutral) into the residence if  you can satisfy your maximum demand with 3 wires (2 phase Voltages and the Neutral) (as residential use almost exclusively single phase load)..

Saves your money..

here in malaysia

3 Phase is 415V (phase voltage) as opposed to Single phase is 240V(line voltage)..

It's only the name of the supply voltage (415V phase-phase)..

I hope thats clear and you're welcome to comment further..

Just to be clear ..

For single phase residential loads..

Your maximum load is limited to the size of the electrical conductor supplied into your home..

The general max size is usually 2x25mm2 Aluminium Overhead cable which gives you a maximum 60A single phase..

This is also why you must not replace the 60A HRC fuse to 100A because that fuse will not blow before the cable starts to burn..

If you need more load then pull in another wire which will give you an additional 60A..

No a 3 Phase kWH meter will cost you more than double the price of a single phase kWH meter and it uses additional cable..

You only pull in another wire if you exceed the existing ..