3 Phase?? or 2 Phase??
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Are you using 2HP aircond on all your room? Are you using downlight, spotlight, torchlight? What is this 3phase anyway? I have never heard before..haha. but, since i have a new 'defect' home :-), more and more information coming including about this 3phase thingy.
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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.
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Quotation to change to 3phase ranging from Rm1.5K to 2.4K to upgrade just your DB.
TNB Approval required? Yes.. For the nusaputra house, which we paid RM400 for electrical deposit to TNB do not cover the 3phase. You have to ask contractor to apply for you.
Refer to this : http://www.tnb.com.my/cms/jscript/uploads/5%20x%207%20in.%20cutout.pdf . Or email to TNB at CoSec@tnb.com.my.
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My suggestion is that, we just upgrade our DB box for 3phase-ready and apply later with TNB for 3phase. And monitor for your electric bill, if it reach RM100, then you can start thinking of applying from TNB.
Got this from lowyat.net forum:-
upgrading to 3 phase from single phase would require the following changes as well:
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a) Your metering panel. If your original panel is the single phase one, you need to buy a new one. Fibre panel with metal base RM40-60.
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b) New cut out fuse + holder 3 sets and 1 neutral link. RM50-80 can settle all.
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c) A bigger DB box with 3phase ELCB and MCB/MCCB modules. Depending whether yours is 32A or 40A or 60A or 100A, the total cost would be around RM150-200-250-400 depends on brand.
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d) No need to rewire your whole house. Just reassign your circuit wiring to each phase according as to balance the load will do. While you are at it, go buy some extra spare SP MCB module. Local less prominent brand woudl cost less than RM10 ea for 16A and below. Recommended brand is Hager, Clipsal, Moeller but more expensive about 40-60%.
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e) Runner fees can save up. Go to kedai TNB take the upgrade form and pay the extra meter deposit. Jot down your NC number and ask for the estimator and meter installer's hp number. Normally TNB will give them to you if you ask them. If not call back again and quote ur NC number and ask the hp number again.
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Reference for 3phase study:-
http://en.wikipedia.org/wiki/Three-phase_electric_power (Read this first)
