this is 2nd time I heard about 3 phase save money (in term of electric bill)? how it's possible? anyone care to explain?

Do you have proof of "your home electric component in long usage"?  & "Thats why if you single phase bill is over RM200 when change into 3 phase will be cheaper because you component has enough power supply and wont drain power."

Fused will be the first to blow / trip if it overuse. If you get under voltage supply from TNB, your fuse will blow even faster, because the current draw will be higher.

RM 200 usage is about 600 unit (KWatt usage per month), that equal to about 20units a day. If using only 8 hours peak, 20/8 = 2.5 unit average high per hour, that only take up to about 10 amps.  Unless you use 1 hour 20 KWatt, than this you need to use 3 phase because you are drawing 84 Amps (highest single phase is 63 Amps)

FYI, my parent house, sometime we pay > 250 per month. Is still single phase.

It is cause by the wiring that you overload it. You still can achieve lower bill by rewiring your house with a single phase. And limit your appliccance to 1 power point.

When your appliccance draw high watt, wire will heat up and give resistance to the voltage (voltage drop). That draw higher amp to run your applicance. And longer the distance wire, resistance is higher. Another is wire material. Use this fomula -> V / R =I 

To counter this, Use bigger dia wire and plan your house wiring system properly. Some forunner here have some good wiring plan you might search back.

A single phase 60A x 240v = 14.4Kwh. Base on your main fuse 60A. Assume you use full but limit 8hr/day and will cost you 14.4kwh x 8 x 365/12 = 3504kwh -> RM1500/mth. Do you use that much?

Blast your 5 aircon 1hp, 3fridge(1.5hp) and heater(3.2kw) consume you 3750kwh + 3375kwh + 3200kwh = 10.3kwh. Using 8hr average will cost you  10.3x8x365/12 = 2506kwh/mth - RM1059/mth. Do you use that much permonth?

This is only single phase.

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Added on March 20, 2012, 12:38 pm
I will go back single pahse. Unless TNB said free upgrade 3phase for me.

What I do is just upgrade the wire and plan properlly. Saving is always in my mind and try to lower the bill as much as possible.

Not to think "going to use more in the future". Unless I strike TOTO.

Does 3P make a different? Let's said I use 60A, then change to 3P still use 60A. Same wire, same load = same heat? Something still missing I believe. Just wanna make sure, I understand correctly what 3P can do and cannot do.. My facebook Taman full will this discussion so wanna give feedback to them also..

This is what 1P vs 3P about.. 3P can support 3 time power load..

Suppose the power is over 1P can handle.. The fused will be burned.

If your house never experience power overload.. as I said let's said below 60A around 50A. Does changing 1P to 3P will affect electric bill?