Hi Guys,

Just got my plan approved ...it's time to do it!!

By the way, I just wanna ask, initially i was thinking of upgrading to 3Phase power, however due to try budgetary problem, I m trying to cut this out is possible.

I was told that I may not need to. Below are the ACs that I have planned , one of the wireman told me that single phase is still sufficient:-



1) 1HP AC - Ground Floor Room
2) 2HP AC - Living Hall
3) 1HP AC - Upper Room
4) 1HP AC - Upper Room 2
5) 1.5HP AC - Master Room

Total : 5 ACs with total of 6.5HP


Of cos at night there will only be max 3 ACs on (all the upper rooms only)




I am definitely rewiring the entire house but may not want to 3 Phase. Appreciate if anyone could advise.


Thx

if u use heavy machinery, lots of ac, bla bla bla things that use enormous electrical power then yes 3 phase
if wireman said ur setting sufficient, then its sufficient^^

TNB website recommend changing to 3 phase on household with more than 3 a/cond

Hmm..that is what they recommended...will take into consideration

What is the benifit to change to 3phase?

If you have more than 1 water heater, and use it concurrent when all the 3 a/c is switch on you maybe hitting > 10K Watt. That will be better to use 3 Phase.

If you know know the max watt draw is < 10 K watt, you don't really need 3 phase.

i have 3 instant water heater, 7 aircon, and other appliances like computer, microwave, oven, refrigerator, washing machine, tv etc. I still using single phase....=.=

i know i wont open all at the same time..if one day really happen, it will be my nightmare

Happen in my mother house once,

2 Instant water heater switch on, 3 A/C switch on, + TV + 2 fridge + other items. DB box fuse blow. Got to temporary "Kung Fu" the fuse to use while i go out buy replacement. My mom house using old school DB box all fused, no reset-able MCB.

Newer house should be able to reset.

But for my new house, will have to be careful, cause I run two independent DB Box.

I will try to convert to 3 phase in the future if the process is easy without rewiring my whole house...if really can be done by just changing meter and DB box, it will be nice...

renovation and furniture + appliances already make me poor like hell

i dunno where you get the info from that 5 AC or even 3 AC need 3 phase for sure.

its just not true in general. it will depend on the AC's startup Amp-uage. Simple maths lah ... 1 HP use how many Amp to start? that depends on tha wattage - take a note and divide by 115 then you have the amps - but usually the max amp is stated on the sticker. for example a 1 HP inverter A/C from panasonic draws max 6 Amps - much less under partial load and they dont start all at the same moment in time either! then add all the max. Amps to see potential max. load. if this is below 63 Amps then absolutely no prob at all. Even if above you wont get into trouble if you KNOW your concurrent consumption will not exceed 63 Amps.

real life example: total of 8 HP A/Cs, PC, three fridges, oven, hood, more appliances = single phase no problem and i always have all of the A/Cs running. i can safely on the oven on full blast (3000 Watts over thats a major sucker!) and no problem.

single phase can tahan 63 Amps with appropriate fuse. so there you go.

So actually no benifit to upgrade 3phase. Just profit the TNB.

Well said....good job~

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Added on January 13, 2012, 10:58 amNo matter how, if got budget, change lar...I don't change because I don't have budget~

This post has been edited by tiensong: Jan 13 2012, 10:58 AM

Change for what if evrything within the Amp. Unless you tell me the bill can be cheaper if in 3phase.

Even got budget, belanja you better.

at least you don't need to worry when turn on all the appliances mah....haha

Worry your pocket. TNB will be happy too.

haha....

Change 3 phase not only just do the DB box. Unless you already pre plan and have your DB box wire for future 3 Phase.

Inside your DB box, if only got 15 MCB, how you want to distribute the incoming 3 hot wires? (RYB)

Than If TNB don't allow house owner to put meter inside the house, house owner need to hack and put outside, beside the gate pillar. More work.

how i know my DB box is wired for 3 phase or not? check which part?

What to worry? Just a fuse blow.

Actually come to think about it, i got more direct power socket than 3 phases house. I got total of 30+ socket, and 80% of it are direct to fuse box.