currently using 3 units at home, plan to install another unit, will tripping the circuit breaker anot? anyone 

Macam one phase only

Did I say there is anything wrong?🙄
I was answering his question how to check how many phase

Forgot to add fridge, washing machine, 700w mustard race pc 24/7

careful on that. if TS using 40A breaker size i can confirm GG will trip anytime.

60A should be no problem.

ok..

3 phase supply properly balanced across each phase means no current flows through the Neutral..  The neutral only returns the unbalance current across the phases..

11KV transmission lines is only 3 wires.. It is distributed in Delta with all phase current balanced.. Only when step down by transformer from Delta 11kV/433V Star is where the neutral is introduced where the Neutral is earthed..

From Transformer it goes to a Feeder pillar where there will be an Earth fault protection device before it gets distributed to residential properties where is must also be earthed at the DB.. This is known as a T-T (Terra-Terra) system..

The usual tail into a residential landed property is only 2x25mm(60A)  or 2x16mm2(40A) Aluminium cable which only provides you the fuse rated max demand load which is a slow blow high rupture capacity fuse..

This maximum demand can easily be exceeded by the high inrush starting current of inductive motors (your aircon motor)..

3 Phase is the name of an electrical supply.. It can be 3 wire (2 phase lines plus Neutral) or 4 wire (3 Phase lines Plus Neutral) supply..

Single Phase is the name of a electricity supply of a 2 wire (one phase plus Neutral) supply..

If in doubt please get a competent electrical contractor to verify the existing maximum demand to check that your wiring can handle the electrical load..

You can easily overload (think electrical fire) your existing wiring if you change your protection fuse to a higher rating without knowing your maximum demand..

What I am saying is basic electrical common knowledge to all electricians..

If you don't understand what I'm saying please talk to an electrical person who knows something about maximum demand and how to use a clamp on ammeter..

Electricity is not your friend .. It is a known killer held in a copper prison just waiting to kill you..

This!

It is the cables that will burn and create fire hazards.

Yes, can support 4 x 2hp aircond but what else is in the house?

It is cheaper to upgrade or get proper electrician to check on the wires and loading then burn the home down.

You understand .. but no one knows if he has an inverter unit or a conventional DOL start and that pictures shows  a DB with 24 SP mcb's single phase..

I have never seen a single phase DB with so many mcb's..

Add to the fact they're all non branded components easily means if that RCD is defective any surge inrush current from a DOL motor will fuse any of those mcbs  short circuit and start an electrical fire..

And it's not all soft start.. There's definitely more conventional DOL AC motors out there than inverters..

er...those soft start u mention does it applies to newer non-inverter AC?

but then....AC is a very long lasting thing. my house still got NATIONAL name tag AC

I've been using 4 inverter ac (1x2hp & 3 x 1hp) for the  past 4 years. No issue except have to pay a lot to TNB    Just make sure it's connected from different MCB.

No sign of wiring overheating or what so ever.    (Checked with FLIR thermal camera)

We're not talking about a single unit compressor.. The issue is maximum demand..

The maximum current load as in he already running 3 of his existing aircons couple that to the existing running load (refrigerator, lights, sockets, etc) and now his compressor kicks in..

This transient inrush will cause arching to the mcb's contact points..

It doesn't have to happen immediately when the contacts are still new or the spring tension is still good.. This will continue until a weak link in that electrical system fails..

You are an intelligent person.. What would your advice be to this situation?

Borrow from my brother. His company have some project with TNB that uses FLIR. 

So far, everything normal. No sign of wiring overheating even though 4 ac are on simultaneously.

And I use this to check each AC current / load. All good 

I'm not worried about lighting load as 100% LED light use throughout my house. Too little load.

wah...ni next level

thermal camera also come out

but2....26 ~27 macam langsung tak sejuk bang