| Type of cable | Size (mm) | Best for |
 | 1.5 | Lighting point, fan, normal point |
 | 2.5 | Plug point |
 | 4 | Appliances require more electricity, air conditioners, water heater |
Above table only mention wire size commonly use in a normal household. There are other larger wire size in the market but mostly only for industrial usage. Larger size also means higher price and also for higher electricity usage.
For 2.5mm wire, one roll (I think around 100m long) cost around RM50 – RM100 depending on the size and quality. It can be used for both plug point and lighting point but in term of suitability, 1.5 mm is much preferred for lighting and fan point. Why? Most switch box have smaller wire holes if compare to plug point box. When you do some looping, this tiny hole will give you a hard time if you use 2.5 mm wire.
