Green wire exposed nevermind as its earth wire.

Just to be back to the topic, in an ideal situation three phase wiring neutral current will be 0 amps if all the phase are balance. However it is difficult to achieve that so in an unbalanced usage the neutral current will be be equal the most at single phase equivalent. Thats why only one neutral wire. Whereas single phase neutral current will be equal to total current comsumption.

TNB is using between 100 to 150 watt bulb. RM10 is all you have to pay every month.

All Sifus

I am planning to change to 3-phase for my 10-year plus house. It will be underground connection from TNB pole (very near - please refer photo) to meter panel at gate pillar, to DB box inside.

I obtained a quote from one of TNB approved contractor, exact words as follows:
1) TNB meter deposit - paid by owner RM2,000
2) TNB contribution - RM1,700
3) TNB form - RM800
4) TNB meter board and 3 nos fuse, 1 no. neutral and run cable 16mm - 20 meter DB to TNB meter board - RM2,500
5) Workmanship - RM800
Total RM7,800

My questions are:
1) Is this a reasonable quote?

2) RM2,000 for deposit? I know 3-phase deposit is RM800...then what is RM1,200? Googled and found "TNB 3-phase underground cable service fee is RM1,200". Asked the contractor, he said, "Is refundable", didn't explain further.

3) What is "TNB contribution"? Googled, found this --> http://www.malaysiakini.com/letters/44874

4) I asked the contractor what is "TNB form"? He said, 'Is licence"?

Please help to advice. Thank you.

This is my 3 phase upgrade experience.

http://forum.lowyat.net/topic/1918768/+1240

Overall cost is not as high as I thought it would be.
You guys can refer here in as a standard for comparison if you think that you are being overcharged.

phoenix69 u paid RM1k for 3-phase conversion,wahlau someone told me it will cost RM10k+ and mmust wait indefinitely for TNB approval.so any review on using 3-phase (especially monthly electricity bill)?
btw all sifus here,what are the things i need to check if i wanna switch to 3-phase now?

Call my electrician Mr Steven Chong 012-3377299. He is
reasonable and capable.

Hi i am new in this wiring thing. May I know if the above pic the wiring is single phase or 3 phase? Thank you.

Not sure on this, but I guess it's Single Phase.
Cos mine is 3 Phase, I have 3 black box thingy, instead of 1

Single phase

You are right, 3 phase will have 3 cut off fuse (Black box thingy), while single phase has only 1.

My Wireman mentioned i will be charged higher in the TnB bills if i convert it from single phase to three phase, despite the usage (Kwh) is same.

I wondering whether is it true? as my house title is "Residential" and i check with TnB Traffic Online, it only have one traffic table for residential houses. Therefore i presume the TnB bill will be remain the same after i convert it to 3Phase.

anyone have the before and after experience regarding this?

Thanks.

Ur wiremen are bluffing bro.. Whether u use single or 3 phase, ur charges based on ur kwh. if use more, u pay more. Unless u are under commercial tariff. As long as u under residential tariff, no change in tarif. Trust me as i am TNB staff

hi, like in my case the new house comes with single phase, how do i know if can change to 3 phase or not? Just walk in to nearest TNB office? Tq

Change outside, internal house wiring never change is useless. Waste of deposit and labor fees.

Noted. Thanks. I am going for 3Phase then. Easier and feel Safer on the overloading.
Banting Area, Still having 3Phase Promotion? will go over and apply by year end.

If you are doing house renovation, and do recabling yes it can evenly distribute the load by experience contractor. But if just change the incoming to 3phase, it does not gurantee you are not overloading, the internal cabling need to be redirect to different phase. To be exact is Red Yellow Blue supply.

Try to figure out you really need 3 phase or not. Then only make decision to upgrade. The upgrading works is not straight forward and kind of complicated.

Upgraded, it just a simple process as drop by kedai TnB to obtain the list of contractor, then pay the services, then come and install the new meter in 2 weeks.

as residential, Imbalance Power Factor Ratio is no applicable to Residential Account Right?

Nope, it does not.
3 phase the only advantage is you can run the whole house with air conds. Single phase are limited to 2-3 max.
Also for load balancing, make sure the wiring work done properly, else if still 1 phase only working, it defeat your goal.

Hi guys, i have bought an old house and think of changing the single phase to 3 phase. I wonder do i need to re-wiring my whole house cables or basically changing the fuse box outside my house will do?