Maximum demand in Australian load worksheets
A workflow guide for preparing user-entered maximum-demand rows before using the AUWiring switchboard load calculator.
Worksheet purpose
Maximum demand work should leave a traceable row record. The calculator can add entered rows and show worksheet totals, but it does not decide every demand assumption for the project.
The useful result is a structured review record: load groups, current or power basis, entered demand assumptions, spare capacity notes and the next technical check for the project.
Workflow
- Prepare each load row before opening the calculator.
- Confirm the unit and source for current, kW or kVA.
- Enter demand or allowance assumptions as visible row values.
- Keep spare capacity and future allowance notes separate from present connected load.
- Review the result before carrying it into cable, switchboard or supply work.
Maximum-demand row fields
| Field | Purpose | Review point |
|---|---|---|
| Load group | Identifies the row owner | Avoid duplicate or missing loads |
| Entered value | Current, power or apparent power basis | Check the source and unit |
| Demand assumption | User-entered factor or allowance | Keep the basis visible |
| Phase basis | Single-phase, three-phase or grouped | Affects current and balance review |
| Review note | Standards, DNSP or design caveat | Prevents overclaiming the worksheet |
Reading the result
A maximum-demand result is a planning output. It can show whether entered rows produce a plausible worksheet total and where assumptions need review. It cannot confirm supply availability, switchboard suitability or final compliance by itself.
Use the phase-balancing calculator when single-phase row allocation matters. Use cable calculators when the demand current needs route or cable review.
Boundaries
- Do not hide demand assumptions inside unexplained totals.
- Do not copy fixed demand rules into public page text.
- Do not treat spare capacity as present demand.
- Do not describe a worksheet result as approval for installation.