kangjihh
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Bro, you are right! Round pin! HahahaHi,
If I am not wrong, the window unit air conditioner uses a 15A 3 pin plug, those rounded pins, not rectangle pins.
Though, some split unit air conditioners (lower capacity units) use only 10 A according to their specification, it is normal to have a 20A power point so that there is not mistake of connecting a higher capacity unit to it.
Different amperes power points would need to have different:
1. Overload breaker
2. Wires size
3. Isolator switch
In the event that you use a 15A power point for a 20A load, eg an air conditioner that uses 20A, then you will have frequent tripping of the breaker and also the possibility of your wires overheating.
It is good to do it once and do it right the first time.
The above are my opinion and hope that they are helpful
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