So if i am only using 1 room. And I assume that room is only use 1P.

So I have to re wire another 2P into that room?

So can I do like this

Red = 5 power points (around 8kw / 32amp)
Yellow = 5 power points (around 8kw / 32amp)
Blue = 5 points (around 8kw / 32amp)

But all those I mentioned in a SINGLE room.

Make it more balance.

Hi Sir,
Hope you can help me on this matter.
From the tnb meter (outside) to switchboard (inside), the underground armor cable should be one piece right?
cause i found out the contractor using 2 or 3 cables connect together. If you need to see photo, I can pm you.
is this the standard practice?

I think he means 3phase4wire armored cable that's been joined.

To answer it's usually because the contractor has separate lengths of similarly sized wires thus joining two (or more) would save the spare lengths.

However since the owner is paying then insists that a new installation must not have joined cables since the cable conductor wire strands not properly connected and the joint if burried underground risks of water seepage.

So being the boss just reject that work and get a properly measured cabled installed.