Electrical units
Common V, A, kW, kVA, kVAr, kWh, ohm, m, mm2, percent and A2s labels used by AUWiring calculators.
Electrical units used across calculators
Define the unit labels shown in Australian electrical calculator inputs, outputs and worksheet notes.
| Unit | Written as | Used for | Check before applying |
|---|---|---|---|
| Volt | V | Supply voltage, voltage drop and equipment ratings. | Use the project, instrument or nameplate value where known. |
| Ampere | A | Load current, circuit current and protective-device records. | Confirm whether it is design, measured or nameplate current. |
| Kilowatt and kilovolt-ampere | kW, kVA | Real and apparent power calculations. | Keep phase, voltage and power factor visible. |
| Kilovolt-ampere reactive | kVAr | Power-factor-correction estimates. | Equipment and utility review still controls final selection. |
| Metre and square millimetre | m, mm2 | Route length and metric conductor labels. | Use the calculator's stated length basis. |
| Ampere-squared seconds | A2s | I2t withstand comparisons. | Treat as a worksheet value until device and standards data are reviewed. |
- This table explains labels used by calculators.
- Calculator pages remain the owner for formulas and project assumptions.
How units keep assumptions visible
Use the unit labels to read calculator inputs and outputs consistently; conversions still need the correct phase, power-factor and voltage context.
| Item | Value |
|---|---|
| Purpose | Define the unit labels shown in Australian electrical calculator inputs, outputs and worksheet notes. |
| How to use the source | Unit labels and general electrical relationships used by released calculators. |
| Standards and project context | Australian legal units and SI/metric measurement context. |
| Where judgement is still needed | Use this table for lookup, labelling or worksheet context; do not treat it as a project-specific calculation result. |
| Before relying on it | Confirm current standards, local authority requirements, DNSP conditions, project documents and manufacturer data before relying on a decision. |
Authority basis for electrical unit labels
Check the unit source, version and Australian application before using a label to explain a calculation result.
| Item | Value |
|---|---|
| Source | Australian Government National Measurement Institute and AUWiring calculator field labels. |
| Source type | External authority or standards source |
| Derivation basis | Public Australian measurement-system context plus AUWiring unit labels; no controlled AS/NZS tables are reproduced. |
| Last checked | 2026-07-13 |
| Review interval | Annual or when Australian measurement guidance or calculator unit labels change. |
| Review trigger | New calculator units, changed NMI guidance or revised public terminology. |
| Version used | R09-2026-07-13 |
| Australian application | Australia; metric and SI unit context. |