Current;y I need to have a 2nd DB box.
For wiring from main DB to 2nd DB 10mm is sufficient or 16mm is bit overkill?
Mainly for 4 airconds (three 1HP and one 1.5HP), 1 water pump and 1 water heater storage type.

4x 8A =32 A aircond
1 water pump = 4 A
1 WH =20 A

go for 16mm !

Noted on this, just to check and clarify for 10mm can support till how much? Just wanna learn more on this

Single phase - 40A
3 phase - 32A

If your sub DB is not too far from the main, use the thicker wire. Not that much added cost, and your loading on sub db looks heavy! Especially if you happen to use them all...

10mm about 50 A , giving allowance for safety .

Use only Mega Cables. the no1 Trusted brand in Msia.

https://megakabel.com.my/A-1.pdf

EPS or Schneider rcbo better?
Using for bathroom 10mA

What the difference of Type AC (EPS) and C curve (Schneider)?

https://www.st.gov.my/en/contents/files/dow...N_DOMESTIK1.pdf

Use 20A MCB with separate RCD 10mA better.

Because RCBO rating of 16A seems too low if your heater is high power; and 25A is too high rating for most “developer quality” cable provided.

Hello is there an english version of this please?

Does not seem available on the Energy Comm website (https://www.st.gov.my/en/web/download/listing/150), which I find hard to believe since there are english language docs

Not the latest but it will work.


Attached File(s)
 SuruhanjayaTenagaGuidelinesForElectricalWiringInResidentialBuildings.pdf ( 427.2k ) Number of downloads: 97

Thanks so much!