QUOTE(davidlow7 @ Aug 15 2022, 08:55 AM)
It is allowed but if you are buying a house from the developer now they should be fitting with a 4mm regardless of what - also considering if you are pulling a new wire why not just go for 4mm straight as you will not be straining the wire too much if you on your aircon for far too long hours - also for those who frequently setting the temperature low (than what the ac can actually deliver) would be straining the wire for too many hours as the compressor would not stop. This is the reason why government had changed in this 2021 rule. THis has not factored in the wire quality used by the electrician - which to me the minimum should be Caramay or Mega.
That's an example of an electrical schematic, not the rules for what wires can be used. But if you are going 4 mm², then why not over spec even more to 6 mm²? Must be better with even less "straining", right?
The fact is over speccing is not always a good thing to do. Just this thread is evidence of budget being a consideration for wiring works because not everyone has an unlimited budget or unlimited time. And since ST allows 2.5 mm² wiring for air conds 2 HP (or less), that would be what I recommend. Empirical decision (after taking into account the maximum current draw, the voltage drop across the wire, and the temperature rise of the wire), not what I
feel is right.
QUOTE(davidlow7 @ May 11 2022, 11:49 AM)
Aircon running amp is around 5-10A depending on horse power - does this mean a 2.5mm (direct LNE) is sufficient and there is no need to opt for a 4mm wire?
You had this very same question earlier this year, and so good to know that you now have developed your own opinion on the matter. As for me, I am perfectly fine pulling 16 A through a quality 2.5 mm² cable (Mega, Southern or Fajar, as I spec for all my jobs) and don't consider it "straining" the cable according to the relevant ST/IEC standards. YMMV
Aug 15 2022, 08:11 AM
Quote
0.0208sec
0.53
7 queries
GZIP Disabled