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.
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.
Select cable type, insulation, and installation method (buried – Table 4 or 5). Base current for 70mm² Cu XLPE is around 235A.
For a 10kA fault, 1s clearing time, 95mm² Cu easily withstands the temperature rise.
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.
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. cable sizing calculator as3008
Select cable type, insulation, and installation method (buried – Table 4 or 5). Base current for 70mm² Cu XLPE is around 235A. If you work in electrical design or installation
For a 10kA fault, 1s clearing time, 95mm² Cu easily withstands the temperature rise. soil thermal resistivity