Probably lower. Go and register lah. See what is the cost. If cost really low, than sambung lor. No harm.

You have to take picture for easy understand. Give you wrong infor will shortcircuit your whole house electric.

Best is ask electrician have a look.

Not sure. All the while, I DIY only.

Try search around here. Some body got post before the rate.

Do not leave any bare copper wire outside. Tape the expose copper wire. Or put inside the connector and screw it securely.

Expose wire can cause shortcircuit, fire and dangerous to life.

Single phase

In tnb supply, 240v is come from 415v.

You can't use 380v rate motor on 415v supply. Risk of burn the stator coil.

No problem with single phase. Given you have 2hp of 3 aircon and 2hp fridge running together, it draw 6kw.

You can run anything together total not more than 12kw.

The ELCB didnt control the Amp flowing. It just state there that it max can handle is 40A.

The wire shouldn't be problem. Since your main fuse is 63A. It well over the rate.

25mm amour cable running underground doesn't cut cost. That cost a lot.

You need to find out what cause the trip. Easier of what?

You can just ask and inform them tripping and fire at the connection. Show them the problem. Create some story to tell probably some house overload, many electrical applicance bla, bla , bla. Maybe 1 day burn down my house bla bla bla.

This doesn't hurt your relation and also make them aware the situation. In your neighbour heart, they know what to do.

If you don't have any basic knowledge of electrical, forget it. Your multimeter just endup in dust.

Just get 4D lor.

Just learn some basic power usage calculation how much a single phase max can load. You will know how to control your house electrical appliance if you know the number.

Single phase can max load 63Ax240V = 15Kw. But that is fuse trip point. So you need to reduce to maybe 80% usage. 15Kw x 80% =12KW max load.

Everytime you buy a electrical appliance, it got state the power consumption in Watt(W) or kilowatt(Kw). If it state in ampere (A), than multiply it with 240V (2Ax240V=480w) Take all the number and total up. It cannot exceed your max house load of 12Kw. Example,

7 aircon 1HP (750w) x7 = 5.25Kw
2 Fridge maybe 300w x2 = 600w
1 heater maybe 4kw = 4Kw
3 TV maybe 100w = 300w.

Total = 5.25Kw + 0.6Kw + 4Kw + 0.3Kw = 10.15Kw. So you only left for 2Kw for others like light, WM, pc etc... But you know that you don't use all the electrical appliance at the same time.

If 2Kw not enough for others, than apply for 3phase.

It is a 2.5HP or 2,640W input. It state at the below electricity.

Follow the table if it got write down. That is actual of the power input.

It is a heat exchange capacity.

It is a fuse holder with both Live and Neutral isolated. Should be just 1 fuse base on the diagram state.

The rcca trip is probably something short circuit. Isolated the point and check which 1 cause by it. Stop using it if you found it.

You have to tell us more detail. If not we have hard time to understand your actual situation and just guessing only.

How does it trip? How long it happen? What is your pattern usage.

The rcca trip is not cause by overload. It main is to protect short circuit. A spoil electrical appliances that probably life threaten.

If your consumption is over, the sfu-63 inside the fuse will blow out. Leave you everytime need to change the fuse.

This are the mostly basic scenario will happening. There is still many cause which need you to tell in detail.

So now I understand is, the rccb trip is not cause by the aircon. But other thing that you already solve it and isolated it.

There is no trip and all your electrical applicance are running fine. Right ?

It is just you worry about the tripping or overload and you want to have a 3phase. Because the electrician advise too ?

What I don't understand is, if there is nothing happen since you have using for that long, what trigger you to think to have 3phase? Are you going to have more electrical applicance?

The basically calculation is correct. Of course there is more advance electrical calculation that probably will get you

I have seen 5hp or more in residential.