Electrical Questions For Resale Flat (>30Yrs)

[gunzy 0]

Hi All

Would like to check if a hdb unit is having 30A main supply (not upgraded), can I use instant electric heater that is spec at 3.6kw?

Read on HDB website is 3kw but most models sold in the market are above 3kw, has anyone done that?

Also, is it mandatory to use double insulated cable for the heaters and aircon?

Because what was laid is the usual 3 core cables (brown,blue n green) without the grey, is this normal?

Looking forward to any advises or experiences.

Thanks!

Ryan

[Pelect 3]

No there is no requirement to use double insulated.

Do make sure the heater point is a dedicated point for heater.

As to whether you can use above 3kw, you know the official answer from HDB.

A 3.6kw will run at about 16A which is slightly above the 15A spec by HDB.

I don't know the performance difference between 3.6kw and 3kw but a 3kw will save you quite a bit of electricity dollars in the long run.

There are people who like their heaters to be very hot (even though singapore is very hot) so in that case, I'm not sure if 3kw is sufficient.