Hi,

Anyone can advice me on what is 3-phase wiring and what should I do to apply the 3-phase wiring? how much is the cost?

thanks in advance.

tnb will welcome you to take 3 phase..
got discount some more..
but then why you want to take 3 phase?

3phase are 415Vac supply (generally for industrial use). Typically there are 4 lines for 3 phase (R,Y,B) + N(neutral). For home user, the normal supply is 240Vac, so in order to get this supply from 3phase, u need to tap either 1 of the phase to neutral. Btw, why u need 3phase for home use??

i wish to have cheaper electrical bill...
Do you know how much I need to pay for the application?

Where do you get the idea that 3 phase would lead to lower electric bill?
It all depends on your consumptions. You still own the same electric and electronic devices that consumes the same amount of electricity while on 1 phase or 3 phase.

Btw, back to the topic. Look at your "fuse box".
If it's only 1 row of fuses than that's single phase. If it's 3 than it's 3 phase.

Nowadays, most house comes with 3 phases especially landed properties. However, for condos or apartments; a single phase is enough as you do not have many plug points. Ppl uses 3 phase because they have lots of plug points and do not want to overload one single phase of fuse.

My new house just changed to 3-phase wiring because we have 5 air-cons and 3 water heaters

Yeah for big house that uses alot of air-conds especially then u should make 3phase wiring.

For a normal teres house i dont think there's a need to do 3phase wiring.

Hi dEviLs ,

How much do you need to pay for the 3-phase application?

if the teres house got 3 rooms & 1 bathroom...they still could put 3 aircond or 4 aircond if includ the living hall and a water heater....isn't it better to put 3phase wiring

air-con more than 3 units... recommended to install 3-phase..

are u a home owner? how many air conds and water heater u have in the house ? to ransform from a single phase to three phase is quite hassle though. get an applications from TNB, increase ur electricity deposit, mine is rm 500.00. Then, get a certified electrician to install extra fuse above the meter.

where u get the information that 3 phase is more energy saving that single phase ?

i cant remember exactly because i did it together with the renovation but i think application plus wiring should be in the region of RM2k

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Added on May 8, 2008, 3:36 pmSaw this on TNB website

http://www.tnb.com.my/tnb/highlights.php?Id=165
http://www.tnb.com.my/cms/jscript/uploads/...n.%20cutout.pdf

This post has been edited by dEviLs: May 8 2008, 03:36 PM

Do you still remember how much you pay for the TNB application?

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Added on May 8, 2008, 9:22 pmGot 1 electrician quote me RM750 for the application and RM250 to top up the deposit. Total is RM1000. Is it reasonable?

This post has been edited by nj922: May 8 2008, 09:22 PM

just called Kedai Tenaga Bangi and Kajang
both mention the same thing
if ur normal electricity bill is below RM100....
no need to think of changing to 3-phase
so its like having max 2 air-con and used rarely....the rest use normal fan only....

single phase electric first 200 unit $0.218, >, then 0.289 per unit
3 phase, 1 unit 0.323

New TNB meter can support 100A. Should be enough

err.. how is that cheaper?

it's not cheaper.... only use it if your electricity consumption is very high so there'll be enough flow. my house got 4 aircond and 2 water heaters, hence needed it... otherwise tak payah.....

Where did you get this info from?

From a certified electrician, who currently submitting form to change my single phase to 3 phase at my new shop.

3 phase i dont think will be saving cost

but if u wanna run your heavy load electronics for long hours
3 phase is better then single phase

if u use a single phase or three phase in residential house, the rate is same. first 200 unit at 0.218 and form 201 thereafter will be 0.289. it is standatd.

my house with three phase is using the rate as above and my old man house with single phase also the same rate.

shop, or buisness rate is different as residential area.