AU WiringApril 3, 2026 · 8 min read · Australia
Cable Sizing Australia — AS/NZS 3000 Wiring Rules Guide
Australian cable sizing follows AS/NZS 3000 (Wiring Rules). Common sizes: 1.5mm² for lighting, 2.5mm² for power circuits, 6mm² for cookers and EV chargers. Correction factors for temperature are critical in Australian heat.
1.5mm² lighting (10A), 2.5mm² power (20A), 4mm² (25-32A), 6mm² (32-40A)
1.5mm² lighting (10A), 2.5mm² power (20A), 4mm² (25-32A), 6mm² (32-40A)
Temperature correction critical
Temperature correction critical — Australian ambient often exceeds 30°C
Voltage drop limit: 5% from origin to point of use per AS/NZS 3000
Voltage drop limit: 5% from origin to point of use per AS/NZS 3000
Licensed electrician required for ALL electrical work in Australia
Licensed electrician required for ALL electrical work in Australia
RCD protection required on all final subcircuits since AS/NZS 3000:2018
RCD protection required on all final subcircuits since AS/NZS 3000:2018
Disclaimer: For educational reference. Consult a licensed professional.