Electrical Calculator (AS/NZS 3000:2018)
Circuit Details
Calculations
Current Draw: — A
Voltage Drop: — V
Maximum Current Ratings:
Enclosed: 22A
In Air: 27A
Quick Reference
AS/NZS 3000:2018 Requirements:
- Maximum voltage drop from switchboard to final subcircuit: 3%
- Maximum total voltage drop: 5%
- Single phase: 230.5V ±6% (216.7V - 244.3V)
- Three phase: 400V ±6% (376V - 424V)
Typical Circuit Requirements:
- Lighting circuits: 1.5mm² (16A)
- Power circuits: 2.5mm² (20A)
- Hot water/Cooking: 4.0mm² (25A) or 6.0mm² (32A)
- Air conditioning: 4.0mm² to 10mm² (sized to unit)
- Sub-mains: 10mm² or larger (sized to load)
Air Conditioning Guide:
- Small room (up to 20m²): 2000W
- Standard home system: 2500-3500W
- Large installation: 4000-5000W
- Note: Actual power varies with usage and conditions
Note: Current ratings shown are for PVC insulated copper cables at 40°C ambient temperature. Derating factors may apply.