ElecAS
Table C3 Energy Demand Calculator
Calculate non-domestic energy demand using floor-area and occupancy inputs aligned with AS/NZS 3000 Table C3.
Why this page matters
Calculate non-domestic energy demand using floor-area and occupancy inputs aligned with AS/NZS 3000 Table C3. This static content is published so the canonical route has meaningful crawlable HTML even before the interactive application hydrates.
Who this page is for
Designers estimating demand from floor area and occupancy when the energy-demand method is the better fit.
Relevant standards
- AS/NZS 3000 Table C3
What this tool helps with
- Estimate maximum demand using floor area density and occupancy style assumptions.
- Use the energy-demand method for suitable non-domestic project types.
- Cross-check outputs before moving into cable sizing and installation design.
Frequently asked questions
When should I use Table C3 instead of itemising loads?
- Use Table C3 when the installation type fits one of the listed building categories (offices, schools, hospitals, etc.) and detailed load itemisation under C2 isn't practical at the design stage. C3 uses VA per square metre of floor area as the basis.
Does Table C3 give a higher or lower demand than C2?
- It depends on the building type and load mix. Table C3 is intentionally conservative for early-stage design when only floor area and occupancy class are known; if detailed loads become available, recalculate using Table C2 for a sharper figure.
Can Table C3 be used as the final design demand?
- Yes — AS/NZS 3000 accepts Table C3 as a deemed-to-comply method. Many designers cross-check it against the Table C2 itemised method once equipment schedules are firm.