Cable Sizing Calculator As3008 _top_ May 2026

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.

For a 10kA fault, 1s clearing time, 95mm² Cu easily withstands the temperature rise. cable sizing calculator as3008

Whether you choose a free online tool, a custom spreadsheet, or commercial software, make sure it’s based on the (currently 2017 with 2019 amendments). Standards update—your tools should too. If you work in electrical design or installation

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. soil thermal resistivity