| Cable size calculator |
Free |
Paid |
Standards
- AS/NZS 3008:1.1:2017 (Australian conditions).
- AS/NZS 3008:1.2:2017 (New Zealand conditions).
- AS/NZS 3000:2018 (Wiring rules).
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Automatic and manual sizing for:
- Current rating.
- Voltage drop.
- Earth cables.
- Protection setting (MCB, MCCB, generic).
- Earth loop impedance.
- Fault rating.
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Phases
- 3 Phase AC.
- 1 Phase AC.
- 2 Phase AC 120°.
- 2 Phase AC 180°.
- DC.
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Advanced derating
- Circuit grouping (air, enclosures, underground).
- Temperature variations (air, concrete, underground).
- Underground depth and thermal resistivity.
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Accurate voltage drop calculation
- Maximum or actual conductor temperature.
- Worst-case or specific load power factor.
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Parallel cables
- Single-core and multi-core.
- Active and earth.
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Protection
- MCB.
- MCCB with I²t let-through energy.
- Generic (fault current, time and I²t let through energy).
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PDF reports
- Generate reports with detailed information.
- Includes references to standard tables and columns.
- No watermark.
- Custom branding (own logo, remove jCalc terms, change colours).
- List and view old PDF reports on the jCalc server.
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Technical support
- Email based calculator support.
- No general design support.
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| Maximum demand calculator |
Free |
Paid |
Standard AS/NZS 3000:2018
- Table C1, Column 2 (House, shed or individual living unit).
- Table C1, Columns 3 to 5 (Blocks of living units).
- Table C2, Column 2 (Residential institutions, hotels, boarding houses, etc.).
- Table C2, Column 3 (Factories, shops, stores, offices, etc.).
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Save calculations.
- Save and edit calculations on the jCalc server.
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PDF reports
- Generate reports with detailed information.
- Includes references to standard tables and columns.
- No watermark.
- Custom branding (own logo, remove jCalc terms, change colours).
- List and view old PDF reports on the jCalc server.
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✗ |
✓ |
Technical support
- Email based calculator support.
- No general design support.
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✗ |
✓ |