Theoretically should not be a problem if you're not fitting excessively big fan or factory spotlight.

It is a concept of DI (double insulation) for concealed wiring, conduit and 1.5mm LNE for the run to DB box.
Whilst for light circuit you can get by with substandard 2.5mm cable (I do not recommend) but then again properly made and certified MS2113-2 1.5mm is not expensive (old price RM62RM62, new price RM70RM70) for peace of mind when you sleep

Conduit runs about 8ft full pipe also just a few bucks from electrical store each.
Those on shopee usually halfcuts at 4ft for easier transport but then you need twice as many fittings to join up.

At the DB can just run 6A MCB, whilst 10A still well within the spec of the 1.5mm cable, 6A cuts earlier in case of an overloading fault which in normal use I doubt you'd even come close to 6A for a light circuit.. that's 1380W

For jointing the ones to existing point, to skip the hassle of using the traditional connector blocks you can consider the wago 221 terminal block series, good for up to 20A (overspec for lights).
2-way 221-412 https://my.element14.com/wago/221-412-ve00-...2pos/dp/2536249
3-way 221-413 https://my.element14.com/wago/221-413-ve00-...3pos/dp/2536250
5-way 221-415 https://my.element14.com/wago/221-415-ve00-...5pos/dp/2536251

This post has been edited by ceo684: Mar 18 2021, 08:26 PM

actually I'm engaging a contractor , i stay in condo. they don't want to take risk to drill deeper and put a conduit as worrying it might affect the slab between my ceiling with the floor for neighbor above

Yes it is only 1.5mm for lighting and fan. So is DI better or not necessary? what if my contractor just want to use single layer PVC ?

This post has been edited by Pain4UrsinZ: Mar 18 2021, 08:35 PM

Whilst it is not recommended to just bury cables direct into the ceiling slab, you can use the smallest 8mm OD (5mm ID) conduit to remain complaint with ST rules. This should be easy enough to conceal since OD only 8mm.

https://shopee.com.my/Automotive-Wire-Condu...2975.3959127968

thank you, saw the work done today, the contractor managed to use back the developer wire Conduit PVC as my requested new light and fan point just along the existing conduit.


now i have a new question. can i pull a new 2.5mm wire from the DB shared for 3 Power point outlet sockets (all three for CCTV on 24 hours) and 2 switches for 17W ceiling exhaust fans (on 24 hours)?

This post has been edited by Pain4UrsinZ: Mar 20 2021, 04:43 PM

Overload protective devices (MCB)
The nominal current or current setting of the devices should not exceed the lowest of the current carrying capacities of any of the conductors in the circuit.

For this scenario use C6 MCB (6A) as the smallest wire is likely the one in the fan cable.
The only catch is these sockets won't be usable for other general purpose, but since you're using for very light duty CCTV and fans it should not matter, 6A MCB support 1380W max.

Your total power rating for CCTVs and DVR should be less than 300W + 34W of fans.
So the nominal load rating is very low even we up to 400W (1.739A)
6A will be safe with regards to the lousiest/smallest conductor size (fan cable) in case the fan motor jam (or other overload scenario that can potentially occur), it will not cause a fire.

Why 6A and not other rating MCB?
The CCTV come with power adapter which is regulated (current limited), but the fans are meant for permanent installation and as such they didn't come with a plug (hence no fuse).

This post has been edited by ceo684: Mar 20 2021, 05:36 PM

Hi guys, may I ask if any of you have contact for relocating 3phase wiring at the outside column from existing point to a new column, roughly about 3ft away? I called TNB to come and inspect and quote, the guy came and said now tnb regulation cannot connect their wire, need use new wire, so they gave 2 options, option 1 is to dig the road and lay the new cables from the nearest TNB pole, which will cost a whopping RM25k just to dig and replace the new wires. Option 2 is to install a pole on outside the house, which would cost RM10k+-. So my question is, is it not possible to just connect the existing wires to the new column? Would that cause issues or whatsoever? Because I saw from previous posts it costs less than RM1.5k. Not too sure if its single phase or 3phase.

Thanks in advance.

This post has been edited by bobowyc: Apr 19 2021, 12:47 PM

Hi bro sorry ya, currently i have a project in PJ and i requested TNB to come over to shift a 3ph TNB meter from the existing column outside to the new column next to it, about 3ft away. So the tnb guy came and said they cannot connect the wire, they will need to install new wiring. And to do so, he gave me 2 options, first option is to dig the road and pull the cable from across, and he quoted me RM14k for digging and another RM11k+- for new cables. The 2nd option he suggested was to install a TNB pole, which would cost less than RM10k. My question is, is it not possible to just reconnect the wires since its just a short length away? Because the connection can be done inside the box, hence I doubt so there wont be an issue, not that I can tell, but the tnb guy said better to pull a new wire because in case anything happen, or if i engage another contractor to add the wiring and a problem surfaces, they will still ask to install a new wiring. I am quite surprised by the price they quoted, i thought it would be less than RM5k to install a pole. And i read on our forums here to shift meter only RM1.5k at most. So now the owner also headache I also headache. Partly on my fault for not enquiring sooner first. :\

Thanks for your reply in advance.

The headache of connections other than a direct cable is that loose connection causes fires, they dont want to take the risk and liability.
You'd also find it a mammoth task to get type approved connectors for high amp ratings i.e. not the china RM10 ones.

So means no choice but to lay new cabling? ☹

Edit: possible to use cable jointing kit?

This post has been edited by bobowyc: Apr 19 2021, 05:18 PM

Yes best is uncut direct flight with no joinery but it really depends on which part cabling insufficient. If TNB supply to meter (meter tails) too short I dont think they will approve it with joiner kit for reason of how sure is the joinery weatherproof? If after meter it is use at own risk (I highly discourage)

If incomer (meter into DB box) part too short then just run a new set of direct cable into the house (from meter), even 16mm² also wont cost too much coz they're available in loose cut online (by meter) and in the correct colours Red Yellow Blue Black Green so dont need to purchase all 100m full length. It is not difficult to purchase loose cuts in the required length and in the correct colours. This is especially important in 3phase as phase to phase creates 415V. Bada bing bada boom for 230V equipment. I know some contractor simply use black for everything and just tape the phase colour as 1 strip of tape, but I also generally despise this shortcut as that tape may break or discolour over time.

Here is where you should never ever ever skimp on cables. Easy way is just use Mega kabel or caramay cables sahaja. Many fake SIRIM nonsense with elcheapo cable.

https://www.sirim-qas.com.my/forgery-on-license-no-pc000218/

This post has been edited by ceo684: Apr 19 2021, 11:15 PM

Hmm. I know uncut would be best, but the cables is short only 1ft, my estimation, I have yet to find the actual GI pipe in which the TNB cable is coming in from. But from where I see it and estimate, the cable length which would be short is about 1ft, I guess the tnb guy is playing safe, but that amount to redo is way overpriced and personally quite illogical. He said RM14k to pace the way for the cables, and another RM10k to lay cables. And the pole, he asked me to dig the hole and lay the pipe, and they easy job come and pull wire and fix their pole only. I thought the pole they have their own truck to dig? Why I need to dig? Or maybe he see us as young and naive so wanna take opportunity. But whatever it is, the owner said its way overpriced. She called one of her family member and that family member is also shocked by that amount he quoted.

From meter to DB is no problem, that one I know, even the previous contractor used jointing kit for that. My guess is when the previous tnb contractor did that the 4core 16mm2 wire was short, so hence why they used jointing kit into the house. it was right smack in the middle of the driveway. lol. But I already advised the owner that the best is still running on the sides, because these things we cant tell. And since also I will be running the new auto gate wires from the sides, so hence why i will lay the 4core 16mm2 cables roughly at the same area also. Not next to each other, need some spacing also.

I usually use Mega cables, I do not use other cables. I dont cheap out on this. lol. Anything happen owner come find me man. lol. Dont play play. Its only the incoming from TNB. I would accept if its like RM5k+-, but not RM10k for a pole and wire. lol IMO la..

Agreed. Jointing kit depends on whether type approved / IP weatherproof good or not. Alternatively if it is just short to the cutout fuse, can extend the part from "cutout fuse to meter" and get it recertified by TNB will be cheaper?

Possible to do that? How would I go about getting a recertification from TNB? Im planning to call a few TNB contractors and find out. Hopefully tomorrow they will provide me some solutions.

As I recall the cutout fuse can also be below the meter. Meter has its specified height. To eliminate joints in between, as you mentioned its short by 1 feet, if they OK to use a long and tall metal meter box (the 415V type with perspex clear window) and can recertify the connection between cutout fuse and meter which (IIRC will need to be opened up and sticker broken) then its certainly a cheaper solution than digging pole or the road

Something like this
https://shopee.com.my/product/129202704/773...38-1618851869.9

Oh. Thats good to know. I think the owner wont mind a few hundred bucks, shes prepared to spend about 1.5k for tnb shifting. If thats the case, do i engage another tnbcontractor to come and inspect? May i ask what is my next step now? Im thinking to walk in to the nearest tnb contractor office and ask.

Yup can enquire with them. Presumably the bigger box will allow all the necessary connections to be made safely and "can pass TNB"

Okay bro. Thanks a lot man. I'll go enquire a few tnb panel offices from their contractor list and see if they can assist.

Sis here actually. Yup that sounds like a good starting point as technically if they are able to OK the move and recertify those cutout fuse/meter stickers then one less thing to worry about.
For the aesthetics of big meter box..well it cannot be avoided..but it its kinda cool to have a big box

Opps. I'm so sorry! I already contacted one, they will inform me when they can drop by to check and see. Hopefully it all goes well. Haha. I actually don't mind the big box, I would think the owner wouldn't mind as long as the meter can be shifted to the new column. Or else all our work would be for nothing. The box would be enclosed also. Cause our column is built to accommodate the meter inside, no matter, we allowed quite an amount of space for it. 🤣 Thanks a lot for your feedback sis. 😅

Update: I contacted one tnb contractor from their list, they quoted my client 4.8k for laying the new GI pipe, rewire, new board, new outgoing wire into the DB and necessary works. I think its a reasonable pricing. 😅 what do you think?