For a condo, usually the current will go through TNB meter at electric riser before reach the house DB box. Any idea about the fuse Amp at TNB metet?

I was told some at 32A, 63A and 100A? Wouldn't 32A be too low if got few airconds and water heater?

This post has been edited by WahBiang: Jan 21 2018, 03:26 PM

I think should be 63A. Because most of the fuse I had replaced were 63A as well.

Oops, we can change it ourselve?? I thought must wait TNB to do so? 32A is the one given for my condo, sounds weird. If I on 2 airconds same time, sure burn...

Here is my Cut and Paste:

How to tell if I need 3-phase power?

Basically, you should consider switching to a three-phase wiring for the following reasons:

#If you have a high electricity usage at home, or more specifically, if your electrical usage exceeds 50 amps or 10 kW

#If your circuit breaker is constantly tripping because of an overload of your supply

#You have an electrical machinery or device that consumes a lot of power

#You have 3 or more air conditioners running at the same time

#If your house has multiple plug sockets and water heaters, it’s advisable to switch to a three-phase wiring as well to prevent frequent power trips and an overload of your fuse box

“Generally, if you have 3 or fewer air-conditioning units, and each are between 1 – 1.5 horsepower, you should be fine with single-phase power. But if the horsepower of your ACs are higher, consider changing to three-phase to prevent power trips” – Ganesan, an electrician from Megah Global Electrical and Construction.

The current rating to TNB meter is 10A~100A. So, the size of meter cables shall not exceed 35 sq.mm. Developer gave you 32A fuse probably to reduce cost. I went back home one day and found fuse was blown. Someone stole ground copper at TNB sub-station. I had transformer in microwave oven and phone adapter broken. Other house has air-con and plasma tV broken.

I went to nearby electrical shop and replace the 32A fuse to 63A fuse until now. Either the fuse or just luck, my house has only two devices broken. The fuse to prevent extensive damage during over-current condition.

Anyway, the main incominf switch is 63A. So, it is safe to change to 63A. No, you don't need TNB permission to change it to 63A

ur electrical still broken even got fuse? the one at DB box didn't trip also? but the fuse is in electrical riser, need permission to open n change...ask TNB, tnb say ask management office (MO). ask MO, then MO ask me ask back TNB... damn tai chi here and there... i got 4 airconds (3 1HP and 1 1.5HP), 2 heaters, fridge and washer dryer, rice cooker, kettle... so felt 32A too low, wanna upgrade it to 63A.. dunnoe if it is advisable to do so...

Your a single phase or 3 phase?
32amp 3 phase is sufficient.

But i do see house given with 32amps, this usually for smaller house. You have to confirm the cable thickness going into your db box, if its suffices to support the extra load or not.

This probably the developer practice. I've seen Semi-D two-story house were given 32A. Is this still consider small house? TNB will still approve because not against their rule

I guess for apartment, you do not have access to electrical room because it is shared and under building management.

The ELCB did not trip because it is rated at 63A I believe. Electrical (actually electronic) appliances do get damage first before circuit breaker trip because it is not fast enough, in general. SO, you need a fast surge protector for additional protection but damage may still be possible.

So guys if my house is 1 phase..I just change it to 63A..no harm right

Is small apartment with single phase i believe... my load seems higher than 32A easily but may not alw or just 2-3hrs per days... perhaps upgrade it? some unit got theirs replaced with 63A after fuse burned..

I see... then 32A or 63A still possible to burn the appliance right?

It is normal for last time house to have 32a fuse.

Because nowaday, every household is using higher consumption now compare last time, TNB is upgrade it to 63a.

Don't think developer now still using 32a. All should upgrade to 63a now.

agree but my condo still 32A... if upgrade it to 62A, meaning my DB box supplied by developer also need upgrade loo?

The thing you need to check is makesure the main breaker and the rcd is 63a.

But advise to get an electrician to check the wiring that coming from the 63a fuse till db is thick enough for 63a or higher. Also those wiring that you intend to run higher current applicance, makesure is 4mm.

You don't want crazy about upgrade higher current, but neglect the safety. That can burn down your house.

Yeah agree, will talk to my wiring guy... Thx

you might be running 3 phase because 32A is too low for 1 phase. so you can run max 96A but make sure each phase doesn't go over 32A.

normally it's either 1 phase 100A or 3 phase 64A.

when running 3 phase, make sure high power items are on different phase. e.g AC each on different phase, electric hob & oven on different phase. it's called balancing but you can figure it out actually.

It looks like single phase instead 3 phase..

take a photo of the DB.