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Renovations 3-phase wiring

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Sitting Duck
post Dec 23 2008, 08:29 AM

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Hi All,

My house is currently in a blackout now. I have asked the TNB to come and check and they told me that there's power going into the meter but non going into the house. So I have asked a electrician to come over to check but was told that my wiring from the meter to the DB having some problem and needed rewiring again.

The quoted me RM1800 for 3 phase wiring only, without the application with TNB and new 3 phase DB.

So can someone please advice me whether this is reasonable? I'm in desperate need now as my house is in a blackout now.. Some how I feel that the electrician is trying to con me cause I'm in urgent need to install the wiring..

Can some advice me please?
Sitting Duck
post Dec 23 2008, 10:42 AM

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Well, the TNB electrician said that the power to the meter is ok. So their job is done and it's their problem. So I hire an electrician and they told me that there's no power coming in from the meter to the fuse box. So it's either the wire was broken or burned. This happened before a 5-6 years back but that time the house was still under warranty, so we could get the developer to changed the wiring which they did. So my electrician told me that they might used a low quality cable or they didn't use one single cable/ use cable that was joint together. So, it's possible that the water went inside the cable and that's why it was burned.

And yes, it involves digging and hacking to conceal the cable...

So it that worth it? RM1800 for this? Btw, mind to share where you staying and your electrician contact number? I'm staying in Kota Kemuning, Shah Alam.

Added on December 23, 2008, 11:00 amJust got a called from another electrician. They told me that even though that TNB side is 3 phase ready, meaning to the power meter. If we plan to use 3 phase, the TNB will still charge us the cabling for the 3 phase meter once we start using it. Is that true?

This post has been edited by Sitting Duck: Dec 23 2008, 11:00 AM
Sitting Duck
post Dec 24 2008, 08:04 AM

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QUOTE(kimyee73 @ Dec 23 2008, 04:38 PM)
That is quite a lot of work. Not sure it is worth rm1800 or not. Did the 2nd electrician gave you a quote as well?

When it is 3-phase ready, all wiring from TNB to the meter panel and cutout fuse would be 3-phase. If your meter panel is not for 3-phase, you have to change that as well. There should be no further charges except to increase your deposit. The additional cabling charge is for house that not 3-phase ready.
*
1st electrician quote me RM1800, including hacking and patching back after hacking, including some tiles. 2nd electrician quoted me RM1500 for the wiring + hacking but do not include patching as it will be done by third party which would cost up to RM500. Well, 2nd electrician quote seems to be better, since patching is done by third party which is suppose to be expert in patching up things. But I hate the 2nd electrician's boss attitude cause he was acting very "sombong" in front while talking to me. So I have made appointment with the 1st electrician and ask them to lay the wiring as soon as possible for RM1800.

I talked to both the electrician again and once again they confirm that TNB will still charge the 3 phase cabling from the TNB distribution point to your house power meter even though it's ready. Reason being that TNB has laid the cable and now since that you want to utilize it, so you need to pay for it. So they quote me this:

1) Cable from TNB distribution point to your house meter: Electrician #1: RM1250 Electrician #2: RM2250
2) 3 Phase DB box: Electrician #1: RM350 Electrician#2: RM500
3) Panel Electirician: Electrician #1: RM1000(rough estimation) Electrician #3: RM800
4) Deposit to TNB: Electrician #1: top up to RM1000 Electrician #2: top up to RM800


What I really wanted to know is #1, whether is true. Since most post here say that it's not necesary to pay for #1 since it's ready to your house.

Hi kimyee73, would you be kind enough to pass me your electrician contact so that I could apply through him once my wiring is ready?
Sitting Duck
post Dec 24 2008, 10:20 AM

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Aisks..that's too bad...a friend mine told me that there's still a promotion for 3 phase wiring.. need to check TNB directly.. I'll go there after work today..
Sitting Duck
post Dec 24 2008, 12:12 PM

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Wow, that's cheap..

Well, I have one 1.5 HP air con which is only turn on at night around 10:00PM till 6:00AM, 1 refrigerator, 1 water heater (24 hours), 1 PC and 1 washing machine which is used 3 times a week, a TV and that's it.

My monthly electricity bill is around RM200.. which is think is too expensive.. sad.gif
Sitting Duck
post Dec 24 2008, 12:29 PM

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QUOTE(tgeoklin @ Dec 24 2008, 12:22 PM)
It depends, newer & more efficient fridge & air-cond can cut yr bill by over 50% and so does adding capacitor onto your DB. Cost more upfront but in the long run much cheaper  smile.gif
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Sorry but can you please explain to me the "adding more capacitor part"? I'm very bad with electrics... I was told that the the plug or capacitor (not sure what is it called, the one that plug into the DB one) that was used by the developer in the DB are really cheap ones. So I was told by electricians to change them but I'm not sure whether it helps to reduce electricity bill if I change them to better ones...so whenever the capacitor burns out,I'll just changed it to something else which the electricians brought to my house and change it, not even sure whether quality of it..


Oh ya, I heard that the new air-cons and fridge, the one that can save bill, is really expensive to maintain as they require different chemical to maintain/service them.. btw, do we need to service our fridge if the fridge is not having any problem and it's cool enough? I have not done anything to my fridge for the past...err..7 years...

Any recommendation?...trying to cut down my electricity bill..

Added on December 24, 2008, 12:38 pmI just noticed this:

http://www.tnb.com.my/cms/jscript/uploads/...n.%20cutout.pdf

Kadar Promosi adalah seperti jadual berikut:

Service Kabel Bawah Tanah:

60A - Kadar Biasa: RM1250, Promosi: RM400
100A - Kadar Biasa: RM2250, Promosi: RM 900

Looks like what my electrician told me it's true, we still have pay the cable from the distribution point to our house even though it's ready...sad.gif

This post has been edited by Sitting Duck: Dec 24 2008, 12:38 PM
Sitting Duck
post Dec 25 2008, 09:00 AM

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QUOTE(tgeoklin @ Dec 24 2008, 04:01 PM)
Not sure how to explain it proper but you are right about the stock DB installed by the developer as being the cheapest normally, which may be just able to pass ratings under normal usage. But there are no capacitors there, which are normally used at all highrise or big buildings to regulate and enchance usage efficiency. If you are a heavy user, then its recommended to install such but may set you back anything from RM2K onwards depending on component type.

I believe you are referring to the different type of gas or coolant used in fridge/air conds as other than the extra invertor added on, which do not require servicing normally, they are really no different from the older models. However, they are of course more expensive somewhat than the regular type. And no aquarium pump if you really want to save power as they are the worst culprits and nothing so far can help much in that respect
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Sorry, mind to explain the "aquarium pump" part. I do have a fish tank and have 2 small pumps running. I thought it should eat that much of electricity, considering the device is so small.
Sitting Duck
post Dec 30 2008, 07:42 AM

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QUOTE(gogo2 @ Dec 29 2008, 08:49 PM)
That's very expensive. I got 1HP air cond turn on from 8pm to 3am. 1 430liter fridge. 2 water heater
only turn on when take bath. 1 PC. 1 9kg washing machine. 34" CRT TV.

RM40 per month of electricity.

The problem is your 24 hour water heater. Please turn it off. Your electricity will drop to RM50 only
I believe.
*
Opps, what i mean by water heater is water boiler... those that boil the water and keep it warm for drinking... my bad for not explaining properly... and I have 2 small water pump running for my aquarium.. 1 water heater that is only turn on when taking bath..that's all.. that's why some times we don't know why our house is consuming so much electricity.. sad.gif
Sitting Duck
post Jan 2 2009, 07:41 AM

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QUOTE(gogo2 @ Jan 2 2009, 12:25 AM)
Actually that's the thing that make ur house consuming high electricity. Can you
try switch that off for 1 month?
*
I can't switch off the water boiler.. sad.gif my children need to drink milk....btw, any one can teach me how to calculate the energy consumption for a water boiler or other electrical appliances?
Sitting Duck
post Jan 12 2009, 07:46 PM

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QUOTE(kimyee73 @ Jan 2 2009, 06:31 PM)
Calculating for something that not consuming constant current such as the thermo-pot is quite tricky as it boil the water once in a while and keep the water hot most of the time. Generally rule of thumb for calculating electrical consumption as below.

kWH = W/0.85/1000*H*D*R

where
W = appliance wattage eg. 150Watt
0.85 = typical power factor
1000 = convert to kiloWatt (kW)
H = Hours of operating
D = Days in a month eg. 30 days
R = TNB rate rm0.30/kWH (1st 500 units) & rm0.39/kWH subsequent unit

So if you turn on TV rated at 75W for 4 hours daily for a month, you need to pay

75/0.85/1000*4*30*0.30 = rm3.18

Power factor can vary depending on what is connected to the circuit etc., and there is a device in the market that will improve your power factor, hence lower your electrical consumption.

Added on January 2, 2009, 6:45 pmHere is another update on my 3-phase. Finally able to talk to an electrician from the electrical contractor. He told me my main switch is flush with the MCB body, hence I cannot see it. Will check it out when I visit my new house the next time. As for the 63A, he said it is 63A per phase, hence total is 63A x 3 phase = 190A and that is plenty for me. Not sure if he is bluffing. Anyone here know better?

He also said I would not able to apply for 100A as the TNB fuse setting and underground cable rating is just 63A per phase. If I insist on 100A, TNB need to pull new cable and I have to pay $$$$ for it. They are the housing project electrical contractor, so I tend to believe this. I think I'll let the matter rest for now.

Added on January 6, 2009, 4:13 pm
How was your 3-phase connection coming along? Mine already confirmed need to pay rm1250 contribution to TNB  cry.gif Stupid thing is they don't allow me to pay my deposit together with the contribution. I'll have to make another trip to TNB later.
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So which means we still need to pay $$$ to TNB for the wiring from the TNB power distribution point to our house , regardless whether it's already ready or not.. sad.gif

I paid RM 1800 for the 3 phase wiring from the meter outside the house into the DB inside the home. It's done now and so far there isn't any problem.. (touch wood)..

And thanks for showing me the calculation..some day i really need to sit down and calculate what's the consuming so much electricity...

Added on January 12, 2009, 7:51 pm
QUOTE(gogo2 @ Dec 29 2008, 08:49 PM)
That's very expensive. I got 1HP air cond turn on from 8pm to 3am. 1 430liter fridge. 2 water heater
only turn on when take bath. 1 PC. 1 9kg washing machine. 34" CRT TV.

RM40 per month of electricity.

The problem is your 24 hour water heater. Please turn it off. Your electricity will drop to RM50 only
I believe.
*
I just remembered this, I was told me someone (cannot remember who, a friend, electrcian, TNB, newspaper??) that which one fridge and some basic electronics in the house (tv, lights,etc), the minimum would be around RM40~/month, without air-con that is... so with 1HP air-con that is on about 7 hours a day, can the electricity bill still be at RM40/month??



This post has been edited by Sitting Duck: Jan 12 2009, 07:51 PM
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