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

40 amps justify Like that I run about 50+- when switch on all a/c and light. Need to upgrade already.

This post has been edited by weikee: Mar 13 2012, 04:30 PM

Got too much money, no where to keep

Can you explain why more DB less trip?

Save electric, have you try trip all the mcb or the 3 main circuit breaker, and see if your meter still run. Try it.

From my humble knowledge. lighting strike not related to the old or new live cables or neutral. Not even related to 3-phases or single phase. Very much on the soil, and earthing. Your rewire may have fix the earthing. It could also be your previous Circuit breaker is due for change.

But it not related to DB, be it you running on Single or 3 phases. More of environment and other factor like soil content of mineral, height of the land area (above sea level) etc...

A reason to change 3P

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.

This post has been edited by weikee: Mar 20 2012, 11:02 AM

TNB change my old single phase meter to new single phase meter, power usage seem lower too. It could be the meter too..

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Added on March 20, 2012, 11:37 amAh well, this is forum to discussion or exchange idea. We only give our idea, thought, and experience. At the end is still house owner decision.

I just find it irritating when people give information without data and fact, this can be very dangerous in some situation.

This post has been edited by weikee: Mar 20 2012, 11:37 AM

No one mention about the incoming cable from TNB, TNB usually have 4 cables run from one row of houses (3 Phase), and this supply > 63amps per phase. For longer row of houses you see one two supply end to end. If you have large and thick cable tap to one single phase you can actually run higher current too.

Mine is slightly lower. It could be your old meter running lower after old age, mine go faster after old age.

My main fuse was rated 43Amp, it was given free to my by my electrician. The 60 Amps was taken by the ex-owner so no one can steal the electric during the SnP transaction.

I use for long, it never burned even all my 6 a/c switch on. Only later when I want to test full load, I swap back to a 60Amps.

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Added on March 20, 2012, 2:53 pmSo 60Amps really go long way.



This post has been edited by weikee: Mar 20 2012, 02:53 PM

May way todo, some go to one main DB, and distribute out to another db, all depend on load how you want to do. And usually ground floor have all the 3 phases. Some design all terminate in one DB box (ground floor), and design have independent DB box per floor. If you have 3 stories, 3DB box. Some go direct to the meter. Each have its good and bad.

Usually first floor have a DB box with busbar for difference phase. If your load is not high on other floor, each floor will have only one phase. But if load is high on other floor, they will pull 3 phases to the floor, and distribute via busbar.

For my house, is single phase, but I have 2 independent DB box with independent ELCB. When ground floor trip, my first floor still ok, Vice-versa. (Technically, I can go 63 Amps x 2 but my limit on the main fuse. )

This post has been edited by weikee: Mar 20 2012, 04:15 PM

Fuse is for protecting over current. Over voltage will happen all the time, even under voltage. Some area swing around 240 +-5v

This post has been edited by weikee: Mar 20 2012, 08:42 PM

Big house you have there. You did not mention where the DB box be? all same floor? If all same floor, you better of using a bigger DB box, as all fused and ELCB in once area.

Looking at your summary, your DB 4 have risk of overload too. Say if you switch all the equipment same time ( 3x 1.5 HP = 3600 Watt +-, 2x WH = 6000Watt, if someone use Iron, and put in some high current equipment e.g. Vacuum cleaner say 3000watt) You already use 12,600 Watt about 52 Amps. Few more socket you go above 63 Amps.

You plan to use instant or storage WH? If storage maybe you can consider solar since you have 4 unit. You save the money from 3 phase and use it on Solar. Maybe top up 1 to 2k

Wow, 15 fused with 3 phases. I feel is over kill.

This is usually how a 3 phase wiring look like

http://www.electrolesk.com/Work/Wiring%20o...ion%20Board.htm

But of course separate DB also been practice.

I don't know, not in this line. All i know ABB, hager is good.

Anyway, even now, hager and ABB have clone version. Hard to tell.

Did he put the decimal point wrong? 7.80 for hager is dirt cheap.