Hi All,

Since EV is going to be something common soon, perhaps in the next 5 years (sooner/later) - does it make sense to prepare a charging point for the EV at your renovation stage?

What kind of setup should it be? 4mm/6mm wire spec?

This post has been edited by davidlow7: May 11 2022, 10:02 AM

nowadays wallbox using 3 phase power

maybe should ready 20A of all 3 phase ?

i thought can just plug into any 13A point je? i see many in parking lots

I am going to standby 6mm wire for now but the cost is going to be madness especially using a good cable.
Good cable needs to be accompanied by good setup eg. the MCB all so the added up costs kind of worrying now.

Just pull the 3 phase power first. Doesn't cost a lot to do it while you are renovating. Plus can conceal in the wall.

If you do it later, ask yourself do you want to hack and re paint? Or you ok with it running with a PVC tube on surface without hacking?

Yes, I get you.

Just wondering is 6mm cable is the right spec for EV, based on what I read so far should be good for L2 home charging.

See how many amps is the EV charger pulling..

Looking at the current market the home charger starts 7kw to 22kw - whopping high ⚡ here that us why I opted for 6mm cable which the wireman finds I'm a crazy customer because no home owner installs 6mm wire... I guess theory doesn't lie that 6mm is probably the minimum only

saw some schneider electric brand in genting when were there. i think they also have for home as well

You can already find two in ABB Official Store in Shopee now.

The more important factor for high power EV charger is 3 phase power.
Single phase can support up to 7kW only regardless if you use 6mm or even 10mm wire.

Please opt for the 5 pins 3 phase plug for your EV charger.

This post has been edited by Snoy: Aug 21 2022, 06:11 PM

planning for reno and also thinking of putting a power point for ev charger in the future.

as my house has already 3 phase power supply, from the current specs, 22kW charger is a common one. this means 32A which in turn will require 6mm.sq cable as mentioned above.

the question is, how shall i terminate the cable? shall i reserve a few meter extra length and hide it first above the car porch ceiling? or terminate it with an isolator at high level (below ceiling) of the car porch wall?

since the DB is just behind the main entrance door, i would expect that the cable length will not be that much. from shopee i see mega cable 6mm is about rm3 per meter, then x5 cable (3ph+n+e) x 20m will only cost about rm300, then + mcb + labour i think the total cost should be less than 1k?


This post has been edited by lowyat101: Aug 19 2022, 08:54 PM

If you are doing it just for the future you might want to consider terminate with a socket plug point first but this means you already locked down the spot..

Otherwise you can just standby the cables longer and roll them up but secure the tips properly so they are not in contact with each other.... - just make sure you turn off the MCB at your DB for safety reasons.

I was charged rm5xx for a 6 sq mm wire (Mega cable) x 2 direct from DB. But price nowadays varies between wireman and also based on project size.

ok thanks for the info

Reviving this topic..
I am also planning to prepare the wiring since I am going to renovate my house soon..

Anyone can advise the wire used for 7kw to 22kw. My house is already 3phase

Use 6mm2 cables of good quality like Mega or Caramay. Each phase will use a 32A breaker to provide 7kw per phase.
Theoretically 4mm2 cables are enough to handle a max of 32A but in reality your future EV could potentially charge for long hours at close to the peak 32A, so it is better to use 6mm2.
General household single appliance will never pull 32A (let alone continuously for more than an hour), but an EV could pull that for a few hours depending on the charging curve of the car.

Since you are home reno now. These are the steps to maximise savings with EV in order

1. Three phase electricity
2. Wiring with outdoor EV charging/wiring ready
3. Buy EV
4. Use normally for minimum 3 months.
5. Use previous 3 months bill (must include EV charging) to apply solar
6. Install solar
7. Enjoy savings

Why this order:
Don't know how much energy you will use and how much solar to compensate. My friend did solar first, bought EV, now regret finding methods to add more panels/solar to cover EV cost...to the point want to install more panels>battery direct EV.

If Solar company allows any placement, then can reno+solar (max capacity) then buy EV. No need to use that 3 month previous average bill. Check NEM3.0 details and packages offered by companies. I use NEM2.0, and that time TNB subsidiary nak 3 months of bill to see capacity

Just install solar to the max ur roof can support , no need 3 month usage to apply ,

yes -this is the best if can.

my time NEM 2.0 cannot do this. Need 3 month usage.

Can , nem 2.0 already can just need to inform ur installer they can do for u