The phase distribute is ok. 1.5+2+2hp (4.2kw) is still well below the phase limit which is 63A (15kw)perphase. Not to worry.

I need some help on wiring issues.
My house is 3 phase ready. Am planning to redo the wiring for the whole house. Since i dont have much electrical goods at home, i am planning to have single phase wiring.
Would it still be safe or will i be facing any problem later. Interms of cost how much percent increment would it be between single phase and 3 phase?

Thank you sifus.

No need to redo the wiring, waste of money. 3 phase wiring the best part is when a particular phase tripped, the remaining 2 still ok.

Thank you supersound for the advice. When i say 3 phase ready it means that the tnb meter is 3 phase ready but i think the wiring in the house is single. Apparently i have to redo due to faulty and horrible wiring job done during renovation.

The question now, i got some feedback from electrician that i have to have 3 phase wiring still otherwise it wont be safe. Is that true? Of course it comes back to costing, my impression 3 phase would be way much expensive compared to single. Any advice? Thank you sir.

If your total usage of your all electricity appliances is not exceeding the threshold recommended for single phase, then 3 phase is not needed.

No such thing 3 phase is safer than 1 phase.

Well, 3 phase is having 3 incoming from TNB meter, red, yellow and blue.
Each phase should go to dedicated area of your house, like mine upstairs are using 1 phase and downstairs using another 2 phases.
What are the worry on 3 phase wiring is, sometimes the wireman will only use single phase as this is to reduce the work involved. because you will see more fuses in the distribution box.
3 phase wiring are more on load balancing, for house use, it won't really have significant savings. But with 3 phase, you can have an air cond each room while single phase you can have only 2 air conds. You may install more, but if your house burnt down, this could be the excuse insurance will be using to deny your claim

wta
how does the new tnb meter record usage?
if l have 15 amp on 1 phase or 5 x 3 [distributed ].

on old meter, they record the peak amp used.

years ago l had fiddle with the wires in my office . manage to save 25% on bill.

Thanks for the input.

I checked using power meter an average 1hp non inverter AC has a PF 0.99 or 99% efficiency

Noticed smoke coming from my fuse next to meter. Called Tnb, they changed a new fuse but tell me to get wireman to change cable from 16 amp to 25 amp. Anyone can recommend an experienced wireman in Subang/puchong area? I have 4 aircon 2(1.5) aircon and 3 (1hp) aircon, do I need 3 phase?

From my count there is total of 5 airconds. Is not necessary for 3 phase unless all of the 5 airconds on at the same time

That night, I had 4 aircond running..due to guests come to stay. I see the tnb pole cable come to my top floor. thinking of 3 phases, as wifey wants another air con in dining and also the kitchen. How much is the approx cost? Previous wireman says he wired the house 3 phase ready, only need to connect 3 phase to tnb pole. Don't know got such thing or not. I rewired the whole house when renovated but did not go for 3 phase. How to verify what he says?

I don't know how to verify but application for 3 phase is about RM5k including the new DB box. Maybe need another 1k or so for the main cable to be install. This is all very rough estimate it could be more

Hi,

I receive TNB letter for electricity supply application by my developer, the letter mentioned is 1 phase wiring. Can I request 3 phase wiring with my developer?

Or I can only do any changes after VP?

You can apply to TNB for 3 phase after you get the house key. However your house wiring will need to be change for 3 phase for the entire house

House wiring need to be ready, and have distributed load for 3 phase, only than you can benefit of using 3 phase. If just change the meter and incoming is really served no purpose.

Nope, they will charge more, best is you do it your own once you get the VP.

My house currently 1 phase, but wiremen said its 3 phase ready since after looking at my meter box only use fuse at blue, while red and yellow no fuse. He said if want to upgrade to 3 phase just need to pull cable from meter box to the DB and change new DB. Is this correct? Costs around 5k. The purpose i want to upgrade to 3 phase because want to add more air cond. currently got 3 aircond (2.0 at living, 1.5 at master bedroom and 1.0hp at guest room). Is it possible to have plug point at 1st floor living, ground living and guest room on same phase? Need to use homeplug for unifi

This post has been edited by giggs_509: Apr 26 2016, 01:15 AM

3 phase rule of thumb: all three phase's load need to be balanced, so that the efficiency is at the max.

Also, please define new "DB", as far as i can imagine, you need a 3/4 pole MCCB, then re run the wiring

Need to apply from TNB?