Cable Sizing Calculator As3008
A good tool will compute voltage drop at the same time as current capacity—not as an afterthought. It should allow for:
For one-off jobs, a good online tool or well-built spreadsheet is fine. For consulting firms, invest in software that generates compliance reports. cable sizing calculator as3008
If you work in electrical design or installation anywhere in Australia or New Zealand, you know that 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. A good tool will compute voltage drop at
235A × 1.01 × 0.85 × 0.90 = ~182A → too low for 200A load. Increase to 95mm² (base ~275A) → 275 × 0.90 (RHO) × 0.85 (group) = ~210A → acceptable. If you work in electrical design or installation
At 200A, 100m run, 95mm² Cu gives ~0.45 mV/A/m × 200A × 100m / 1000 = 9V drop (2.2% of 415V). Well within 5% limit.