Select cable type, insulation, and installation method (buried – Table 4 or 5). Base current for 70mm² Cu XLPE is around 235A.
Disclaimer: This post is for educational guidance. Always refer to the current AS/NZS 3008 standard and engage a qualified electrical engineer for final design decisions. cable sizing calculator as3008
If you work in electrical design or installation anywhere in Australia or New Zealand, you know that AS/NZS 3008 is the bible for cable sizing. But let’s be honest—manually applying derating factors for temperature, soil thermal resistivity, grouping, and AC resistance can turn a simple job into a headache. Select cable type
For a 10kA fault, 1s clearing time, 95mm² Cu easily withstands the temperature rise. soil thermal resistivity