My house all Eletrical on to max Test incoming Power only around 10A . Means i can change to 2Pole 32A MCB? Developer give now all 63A (1 x 2Pole MCB , 1x 100mA and 30mA) All 63A macam too much .

and after the 2 Pole 63A incoming MCB , the outgoing Cable is using 10mm not 16mm .

This post has been edited by 13aby: Jul 25 2024, 07:06 PM

what?

Dont la like this bro

i not sure i clamp wrong or it really so low , 2 Airconds 2 WH this two is the biggest power eater i guess . Cuckoo , Air Fryer , Washine Machine and Fridge all On .

Or

i just follow back Developer 63A because i planning to change all to HAGER . and mayb the 10mm to 16mm

Advice please

My knowledge in electrical is so vastly impaired, i cant even advise myself.

All the best with your investigation, @13aby

2 AC , 2 WH on already is about 20 A .

use MCB 20 A for AC, WH , 4 mm cable
MCB 6A for lightning. 1.5mm
MCB 16 A for 3 pin socket . 2.5mm

for RCCB 63A , 100mA for mains ,25mm cable
RCCB 63A , 30mA for the 3 pin sockets , 2.5mm cable
RCCB 63A , 10mA for WH , 4mm

post a pix of your DB box better to advise you.

ya thats why i feel weird also . mayb my clamp meter spoil

Using 63A incoming 2 Pole MCB and others 2 Main RCCB 63A also no problem? both is 100mA and 30mA now . Cable to 100mA and 30mA Developer give 10mm but the incoming TNB is 16mm . for the cable size min is 16mm for 63A

My is High Rise Property

This post has been edited by 13aby: Jul 26 2024, 09:48 PM

here is the photo of the incoming (Bottom Left) to two RCCB

looks fine . pix too.


This post has been edited by Momo33: Jul 27 2024, 12:27 AM

so means i can continue use all 63A ya cox i planning to change all to Hager .

change over to Hager is better cos hager products good quality hence bit price higher.

the items your developer use i also never see this brand before.... maybe unknown china product no sirim too .

Bought from two different place , why color different?

I think you can check the authenticity at https://hager.com/_en/check

May I know why you use 63A RCCB instead of 25A RCCB for WH since there should be a 20A MCB for WH to protect the RCCB?

if you know your WH amp rating then chose accordingly .

yes can use rccb 25A, 10mA for those instant WH / 4kW type.

63A one can handle a heavy current
rccb do not trip on over current .

check box manufacture which country
marking on item side s may tell

there is china , France or fake that i have seen .

It’s already sized correctly. Don’t waste money

What I would suggest is to redo the pigtails as there is a minimum bend radius (don't hard turn 90 degrees), keep the cable curved gently. Nanti patah inside and create hotspot.

This post has been edited by ceo684: Aug 12 2024, 02:12 AM

Make sure buy from proper seller. Many recon ABB and Hager from Singapore HIP refurbishing land in MY. Plus why don’t you get 6kA withstand model instead of the 4.5kA. ABB not expensive for 6kA

This post has been edited by ceo684: Aug 12 2024, 02:04 AM

Your clamp meter not true RMS is it.
One unit WH running from cold already take 14-16A easily.

The 16mm one you can buy Mega Kabel meter loose cut in the correct colours (red and black) as necessary, but if your supply (from meter) is 10mm then no point lah.

Also, not much use for the 100mA RCD when the 30mA RCD is capable for whole house sockets and lights. There is little point in using the 100mA RCD in modern day without fluorescent tube lights.

This post has been edited by ceo684: Aug 12 2024, 02:09 AM

I plan to change all to Hager , so i follow back all same 63a for the RCCB and 2 Pole MCB for incoming ya .

Sent , but no reply from them since ever haha


Yes i bought from Authorised Reseller / Distributor shop (Pentapower(M) Sdn Bhd (Puchong) & (CPE Electrical Supplier via Shopee). But they say use 4.5k is enough . Or should i change all to 6k as developer provide?

Ya i redo the reading correct already , 1 WH running around 14A .... Incoming is 16mm from meter but thn 10mm to both RCCB (100mA & 30mA)

For my WH , Developer no give RCCB / RCBO i added myself for safety .

Forget the 100mA RCD (buang), rerun with 16mm inside the DB. That 10mm is only good for ard 40A and can create a hotspot which is unprotected because it is supposed to be 16mm throughout.

means only use 1nos 30mA whole whole house?

The empty space is 2 nos RCCB 0.01 .. not yet install when snap this



This post has been edited by 13aby: Aug 12 2024, 09:08 PM

Yes. According to MS1979 COP it is allowed. And safer too for changing lights.

My neutral bar is separated by two sides , can i connect both side by tapping a wire? or need to replace a longer bar

Common neutral, use a 16mm Mega Kabel pigtail.

U mean connect with a 16mm cable like photo ? 10mm boleh? Existing Neutral developer using 10mm for both side



This post has been edited by 13aby: Aug 13 2024, 10:06 AM

Beli lah one meter of 16mm. Less than 10 bucks per meter only. 10mm not good enough. https://s.lazada.com.my/s.PTisA

16mm i got spare , so i just tap the wire to connect the both bar ya

i dono, but you using 3 phase or single phase?

satu phase

Yes, do a smooth horseshoe shape

just notice i dont have cutter size to cut 16mm haha , any recommendations for the cutter?

MTC-45 or 47 cutters. (the biggest one)

This post has been edited by ceo684: Aug 15 2024, 09:28 AM

if you plan to use your spare 100mA RCCB, then you cant connect both neutral bars.

100mA removed and all now using 30mA RCCB

The MCBs should ideally use the same brand so they're the same height.


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ya will change all to hager , previously i test bought two mcb from 2 different seller . one of it when power off V test 7.xx 😢😢 suspect is fake .... the other one test V is 2.xx perfect ....

Developers have to comply to wiring regulation by Suruhanjaya Tenaga. 10 mA for water heater and wet area. 30 mA for sockets. 100mA for lighting and AC.

in the UK they have moved on to RCBO. No more RCCB as it is included in each circuit. So if there is leakage only individual circuit would trip not the whole house. In Malaysia RCBO is available for Water heater (20A, 10mA trip), the rest not widely available yet or price too expensive.

Which retard teach you testing MCB in off position using voltmeter? If you learn this bullshit from local YouTuber moron then stop watching those crap misinformation. That reading will change due to the effect of capacitance/inductance.

Your MCB should have sirim serial sticker or printed on it.

Dei. Read back MS1979 COP on the RCDs and ER1994 regulation. Especially the highlighted word.

Not economical to use RCBO for every circuit. Even for WH they do not carry the correct size of 20A/10mA. Most of the common RCBO is still 25A/10mA which is incorrect for the 2.5mm cut corner cables commonly installed.

This post has been edited by ceo684: Aug 23 2024, 08:26 PM


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Attached File(s)
 ms.1979.2007.pdf ( 1.25mb ) Number of downloads: 2
 SuruhanjayaTenagaGuidelinesForElectricalWiringInResidentialBuildings.pdf ( 427.2k ) Number of downloads: 3