House wiring is a complex and important task to consider when constructing any building in Australia. It is essential to understand the proper sizing of wiring as this directly affects the safety and efficiency of the electrical system. The sizes of wires used in Australia are based on the Australian Standard AS/NZS 3000:2018 Electrical Installation and Wiring Rules.
The most important factor to consider when selecting a suitable wire is its current-carrying capacity or ampacity. This is determined by the size of the wire and it is important to select the correct sized wire to suit the application. In Australia, the standard wire sizes (in millimeters) are 0.75mm², 1.0mm², 1.5mm², 2.5mm², 4.0mm², 6.0mm² and 10.0mm². The size of the wire should be matched to the current carrying needs of the circuit. For example, a 10.0mm² wire should be used for circuits drawing more than 45 amperes.
It is important to note that using the wrong size of wire can lead to overheating of the wiring and potential danger to those in the vicinity. Also, the Australian Standard requires all wires to be installed in conduit. This is to protect the wire from moisture, rodents, and other external factors.
Overall, selecting the right size of wire for your house wiring project is essential. House wiring in Australia needs to meet the strict standards set out by the Australian Standard. Careful consideration must be taken when selecting the correct size of wire for each application in order to ensure the safety and efficiency of the electrical system.
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