If you only remember three things:
Where:
The standard provides distinct tables based on materials: as/nzs 3008
In practice, for runs longer than 30–50 metres in residential/commercial, (Section 3 of AS/NZS 3008.1.1) will force you to upsize the cable long before ampacity becomes an issue. If you only remember three things: Where: The
Larger cables reduce voltage drop, which means less energy is lost as heat during transmission. as/nzs 3008