Electrical Voltage Drop & Wire Gauge
Calculate AS/NZS 3000 voltage drop and cable sizing.
Input Parameters
Calculation Results
Formula & How Electrical Voltage Drop & Wire Gauge Works
AS/NZS 3000 recommends keeping total voltage drop under 5% from main switchboard to subcircuits.
- Enter Supply Voltage (V): Input your target parameter value.
- Enter Load Current (Amps): Input your target parameter value.
- Enter One-Way Cable Run (meters): Input your target parameter value.
- Enter Conductor Size (mm²): Input your target parameter value.
- Apply Formula: Calculate using
Vdrop = (2 × L × I × ρ) / Area. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
What cable size is standard for 10A power points?
2.5 mm² copper cable is standard for Australian 10A power circuits.
Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Australian Standards including AS/NZS 3000 (Wiring Rules), AS 3600 (Concrete Structures), and AS 4100 (Steel Structures).
Accreditation and technical guidelines for civil, structural, mechanical, and electrical engineering.
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