The sweet spot for most solo electricians and small businesses. Accurate, time-saving, and defensible in front of an inspector.
| Load category | Engineer’s manual calc (kVA/phase) | Free Excel (error) | Mid-range App | Premium Suite | |---------------|-------------------------------------|--------------------|---------------|----------------| | Lighting (LED + few fluoros) | 3.2 | 4.1 (didn’t apply Table C1 diversity correctly) | 3.3 | 3.2 | | Socket outlets (15 general, 5 dedicated) | 6.8 | 10.2 (summed all at 10A each) | 7.0 | 6.8 | | Welder (15A, intermittent) | 2.5 (demand 0.3) | 7.5 (peak) | 2.8 | 2.5 | | 3-phase AC unit (10kW cooling) | 5.8 | 5.8 | 5.8 | 5.8 | | Hot water (3.6kW x 2) | 5.2 | 7.2 (no diversity) | 5.1 | 5.2 | | | 22.8A | 32.1A (over by 40%) | 23.1A | 22.9A | maximum demand calculator australia
Total wattage and type of all light fittings. The sweet spot for most solo electricians and
Restricting maximum current via a circuit breaker or load-limiter. How an Online Maximum Demand Calculator Works Restricting maximum current via a circuit breaker or
Calculating maximum demand ensures that electrical installations are safe, efficient, and cost-effective. It prevents catastrophic system failures and optimizes infrastructure investments.
Categorize all electrical equipment into functional groups like lighting, power, cooking, and heating according to AS/NZS 3000 guidelines. 3. Apply Diversity Factors