Professional Australian Electrical Design Calculators to AS/NZS 3000 & 3008

The ScaleSet electrical design calculator suite for Australian engineers

What ScaleSet is

ScaleSet is an online suite of 18+ electrical design calculators built for professional electrical engineers, electrical designers and contractors in Australia and New Zealand working to AS/NZS 3000:2018 (the Wiring Rules) and AS/NZS 3008.1.1:2025 (cable selection), and every calculator is free to use. It covers maximum demand (Tables C1, C2 and C3), cable selection and sizing, voltage drop, voltage rise, conduit fill, cable tray fill, earthing cable sizing, current-carrying-capacity derating, power factor correction, UPS battery sizing and generator sizing, and more.

Every calculator runs in the browser with nothing to install: no sign-up to calculate, no paywall on the core calculation, and a branded PDF report included on the free tier (downloading the PDF requires only a free account). Paid Pro and AI Pro plans add cloud project sync, project workspaces, branded PDFs and AI Mode.

Built for Australian Standards

Unlike generic international calculators, ScaleSet encodes the specific tables, formulas and worked examples from the Australian and New Zealand standards. Cable selection works against the 30+ tables from AS/NZS 3008.1.1:2025 (Tables 3–31), including current ratings, AC resistance, reactance and grouping factors. Maximum demand follows AS/NZS 3000:2018 Appendix C exactly: Table C1 for single and multiple dwellings, Table C2 for non-domestic installations and Table C3 for the energy method.

The cable database ships with 380+ real Prysmian Australia and Olex (Nexans) catalogue products so conduit and cable tray fill calculations use manufacturer-published outer diameters and masses, not estimates.

Who uses ScaleSet

ScaleSet is used by electrical engineers (consulting, infrastructure, building services and renewables), licensed electrical contractors, electrical designers, certifiers, building surveyors and university students learning the AS/NZS framework. The interactive calculators are paired with citation-rich PDF reports that reference the standard, clause and table used for each result: suitable for inclusion in design submissions and design verification packages.

The author, Wisam Tozah, is an Associate Electrical Engineer (B.Eng Electrical, MIEAust, CPEng, NER, NSW DBP, NSW PRE, APEC, IntPE(Aus)) practising in Sydney, Australia.

What you get for free

All calculation engines, all standards references and all 18+ tools are free. The free tier includes a single-designer branded PDF report (your name, company and accent colour) for every calculation, with citations to the relevant AS/NZS clause and table. There is no calculation cap and no daily limit; downloading the PDF report requires only a free account.

Pro and AI Pro subscriptions add persistent cloud storage of saved calculations, project-grouped workspaces, multi-designer branded PDFs, team-shared cable libraries and collaboration features for larger consulting practices.

ScaleSet and EleCAD: one suite, two parts

ScaleSet is Electrical Engineering Design Software for Australia: the 18+ calculators that size cables, check voltage drop and voltage rise, assess maximum demand, fill conduits and cable trays, and document the result against AS/NZS 3000:2018 and AS/NZS 3008.1.1:2025, each with a cited, standards-referenced PDF report.

EleCAD is the single line diagram (SLD) builder within the same suite: it produces schematic single line diagrams for Australian electrical design and feeds its cable and load data straight into the ScaleSet calculators. Together they cover the design workflow end to end: ScaleSet performs the engineering calculations and compliance checks, and EleCAD draws the single line diagram.

PowerCAD vs ScaleSet

PowerCAD and ScaleSet solve different parts of the electrical design workflow. PowerCAD is an established desktop power-systems design package: a paid, installed application aimed at detailed cable schedules, protection coordination and full project modelling. ScaleSet is free, browser-based Electrical Engineering Design Software for Australia: focused AS/NZS 3000 and AS/NZS 3008 calculators plus the EleCAD single line diagram builder, built for fast, standards-cited design checks with a downloadable PDF report on every result.

Both PowerCAD and ScaleSet are engineering design tools that compute cable sizes, voltage drop and demand to the Australian Standards: they differ in delivery (installed desktop vs free browser), depth and price. Where ScaleSet deliberately stays light is in heavy power-systems modelling such as transient stability and harmonic studies. Arc flash is covered: IEEE 1584-2018 incident energy runs both as a standalone calculator and as a study on every three-phase board in EleCAD. Where ScaleSet is strongest is immediate, no-install, standards-referenced calculations and concept single line diagrams.