I just demolished and built a new house but im still using the single phase for the construction..im going to start my wiring work today..im going to place the meter outside near the tnb pole and do 3 phase wiring works..do i have to submit any documents when applying to 3 phase upgrade at tnb?

just to share my experience...since you are doing new renovation..if possible put 2 DB inside your house...one main DB at infront house then second DB at the back...ensure that your new DB is 3 phase DB. The purpose is easier for you to control...i design my house using 2 DB. If possible place your meter at the gate. The cost to apply and install new 3 phase meter is varies but mine is about RM2K. My meter is at the front of the house. I renovated my back house. Later when i renovate my front house then i will change the meter at the gate.

TQ

it can be anywhere..

you need tnb to install new meter, i.e. to relocate meter. then after the meter into the house, contractor's job. tnb responsible up to meter, including cables from the nearest lamp pole to the meter. depending on the distance from the pole, the charges vary.

If the TNB tap supply from the lamp pole to your house, which i doubt they will, better becareful.

I don't know regarding phase, fius & electricity... how to check whether our we need 60A fius or change to 3 phase?

let say have 2 aircond (1hp each) & 1 aircond (2hp), 3 water heater, 2 42" LCD TV, 1 two door fridge, 1 microwave oven, 1 electrical cooking hub with hob & 500watt desktop

i hv just change to 3 phase...i installed 2 DB inside..one infront, the other at back (direct 16mm cable) from meter. I got 5 airconds and 4 instant water heater, since i renovated my house might else change to 3 phase. It is required to change to 3 phase, incase your power consumption over 60-63 A (single phase). Else failed to change, sometime, you have experience MCB tripped cause by overload.

My design with 2 DB somehow (direct pull 16mm cable) save my electricity bills.


The promotion TNB has ended. During the promotion, user save about hundreds RM for fees.

This post has been edited by tomjason: Mar 13 2012, 11:58 AM

You did not specify is a storage or instant water heater. Assume is Instant:

3 Water heater if you switch on concurrent already 3/4 the limit of 60 Amps fuse. 3600Watt x 3 = 10,800 WH, about 45 Amps.

3 A/C switch on concurrent , you ause up about 3600 WH, about 15Amps.

So if you switch on everything you mention above at the max at the same time, you burn the fuse.

meaning as long as I did not turn on everything at the same time... it should be ok rite...

ok thanks

Don't waste your money. It only profit TNB.

Malaysians so kiasu, a lot of ppl whom want 3 phase have not a single clue what it is, but they want it because more is better.

I've even seen ppl with 3 phase incoming but the house wiring still wired to 1 phase, but they think it is better and 'save' more!

everything is depend on your usage demand...if your usage not so big..no need 3 phase..if you are having big renovation better opt for 3 phase...who knows your future usage demand...

meaning? with such config 60A single phase should be enuf?

if your usage if high for safety reason go for 3 phase..if overload dangeorus..can cause fire...example..if your got 5 airconds and 4 water heater..and other..60Amps is not sufficient...if overload can cause fire..also overload your wiring...

Think about 3 phase as three different single phase coming into your house.
In house setting you will only use individual phase to neutral, you won't be using phase to phase because it gives 1.732 x voltage = 415V. Only in industry setting especially electric motors needs 3 phase voltage or cannot run.

Generally for bungalows 3 phase is good to have. For condos and terrace houses I doubt you will ever need 3 phase.

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Added on March 13, 2012, 2:10 pmIf nothing wrong with your wiring if over current happens the MCB will trip nothing will burn.
Only if got problem with wiring where a short/current leak does not trip your MCB/ELCB there will be a possibility of fire, in that case even if you have 3 phase still can get fire.

And even with 3 phase a irresponsible electrical contractor can be lazy and overload 1 of the 3 phases, in that case that would be risks involved as well.

This post has been edited by northface: Mar 13 2012, 02:10 PM

Another reason why people use 3 phase because they have 3 phase equipment like >= 4HP a/c. Welding machine..

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Added on March 13, 2012, 2:14 pmSorry I don't agree. Unless your house got no MCB or fuse protection. Anything above the threshold it will burn the fused or trip the mcb. Unless of course the owner bypass the fused, and short the MCB.

This post has been edited by weikee: Mar 13 2012, 02:14 PM

having 3 phase is like car and MPV..if you have more children sure you like to upgrade to MPV to cater the children...

more over upgrade to 3 phase is one off investment...and the cost is not much..for my case for processing is RM1500, deposit RM500. for me..it is 'rugi' if you are having major renovation but do not want to upgrade to 3 phase..for your future demand same as MPV..


yes there many cases burn due to wiring such as overload etc..mostly 'rumah papan'....

This post has been edited by tomjason: Mar 13 2012, 03:00 PM

I have only single phase, but i have close to 50 MCB. I don't see a problem future upgrade if required.

I m rewiring my entire house , initially i planned to stay with 1P...and finally I have decided I would just do 3P, due to large family in the house ...i have about 7 ppl in the house....at night I will have 3 AC running...sometimes 4 if my cousin comes over from Penang for Business...due to safety reasons..I have decided to go ahead

the difference for me to upgrade to 3P is roughly about 5-6k...thats inclusive of TNB Deposit, Submision...etc... all in ...RM17k..inclusive all NEW wiring for entire house...

Really not cheap..and I hope I made the right decision once and for all...as i m gonna stay in this house for another 30 years or so

for 3 phase..you do not have to change the wiring..just change the MCB for 3 phase...around RM500-RM1000 depend on how many CB. So for my 3 phase for my existing house (not inclusive new extension house) is RM 500+RM1500 (processing)+RM500 (TNB deposit)...

This post has been edited by tomjason: Mar 13 2012, 03:14 PM