In the automotive world, the naming conventions can be tricky. Unlike household wiring, "Auto Cable" is often named by the external diameter of the insulation, not the actual copper inside. Auto Trade Size Approx. Cross Section (mm²) Common Amp Rating Example Use Case 10 - 15 Amps LED lights, stereos, UHF radios 4mm 1.84 - 2.0 mm² 15 - 20 Amps Small fridges, driving light switches 6mm Solar panels, Anderson plugs for caravans 3. B&S and AWG (Thick Cables)
Choosing the right cable size is critical for safety and efficiency, whether you are wiring a new home or setting up a dual-battery system in a 4WD. In Australia, the standards for household wiring and automotive cabling differ significantly, which often leads to confusion. 1. Household Electrical Cable Sizing (Metric) cable sizes australia
Most residential wiring in Australia uses , measured by the cross-sectional area (CSA) of the copper conductors in square millimetres (mm²). Cable Size (mm²) Common Application Typical Breaker Size Indicative Current Capacity 1.0 mm² Small lighting runs, low-load switches 10A – 14A 1.5 mm² Standard lighting circuits 10A or 16A 14A – 18A 2.5 mm² General Power Outlets (GPOs) 18A – 24A 4.0 mm² Air conditioners, water heaters 25A or 32A 24A – 32A 6.0 mm² Electric stoves, large A/C units 32A or 40A 32A – 40A 10.0 mm² Main incoming lines, small industrial 50A or 63A 50A – 63A 16.0 mm² Service mains for large homes 80A – 100A Key Factors for Cable Selection Cable Size Calculator AS/NZS 3008 | jCalc.net In the automotive world, the naming conventions can