AS/NZS 3008.1.1·AS/NZS 3000:2018·AS/NZS 5033·IEEE 1185-2019
Cable sizing and electrical design, done to the standard.
Calculate cable sizes, voltage drops and maximum demand with precision. Draw the single line diagram, link it to the numbers, and export reports a certifier can sign.
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C1 · Main switchboard feeder
25 mm² 4C+E Cu · 2 × 1C
VD 1.31 % · Zs 0.42 Ω · PASS
How It Works
One workflow from load to signed-off report
Start sizing cables, creating SLD drawings and calculating maximum demand in minutes. No complex setup required.
- 01
Size
Enter the load, run length and installation. The engine applies every derating table, checks voltage drop and fault loop impedance, and picks the smallest compliant cable.
Learn more - 02
Draw
Lay out the single line diagram, link each cable to its calculation, and let the schedule update itself as the design changes.
Learn more - 03
Demand
Build the maximum demand study with AS/NZS 3000 Appendix C diversity, per phase, and size the mains from it.
Learn more - 04
Report
Export branded PDF reports, cable schedules and drawings with the full working, ready for the certifier.
Learn more
Try the engine
Size a cable right now
A simplified AS/NZS 3008 estimate, no account needed. The full calculator adds every derating table, fault loop impedance and protection checks.
This is an estimate based on simplified calculations. For detailed analysis with all derating factors, use our professional calculator.
Get Full Calculation ReportPowerful Features
Everything you need for electrical engineering
Streamline your electrical engineering workflow
Get StartedSLD Drawings
- Drag & Drop Editor
- Professional Symbols
- Export to PDF/SVG
- Linked Cable Schedule
Conduit Sizing
- Space Factor Calculation
- Multiple Cable Types
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String Voltage Calculator
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Voltage Drop Calculator
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Voltage Rise Calculator
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Why Choose CableHero
Trusted by electrical engineers across Australia
CableHero is designed by electrical engineers, for electrical engineers. We understand your workflow and compliance requirements.
- AS/NZS 3008 & 3000 Compliant
- Professional PDF Reports
- Cloud-based & Accessible Anywhere
- Regular Updates & Support
Simple Pricing
Choose the Plan That
Works for You
Starter
Best For: Minor projects
Free
Get Started for FreeKey Features:
- 1 project with 50A load limit
- AS/NZS 3008 & 3000 compliance
- Real-time calculation feedback
- Basic cable sizing tools
Individual
Best For: Electrical Engineers, Electricians, Designers
A$250 /year
Start Free TrialKey Features:
- Unlimited projects & loads
- All tools: cable sizing, SLD drawings, conduit calculator
- Maximum demand calculator
- Custom PDF reports with your logo
- Priority support & updates
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Best For: Teams & Organisations
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Contact Us for PricingKey Features:
- Everything in Individual plan
- Team management & collaboration
- Flexible seat-based licensing
- Shared projects & calculations
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Built on the standards you certify against
- AS/NZS 3008.1.1
- AS/NZS 3000:2018
- AS/NZS 5033
- IEEE 1185-2019
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Get ready to simplify your electrical designs
Start calculating cable sizes, generating SLD drawings and creating professional reports in minutes. Join thousands of electrical engineers using CableHero.