Cable Sizes Australia — Safe

Voltage drop between the point of supply and the equipment must not exceed 5% for general power (230V → 218.5V) or 8% for lighting (230V → 211.6V).

Here is everything you need to know about choosing the correct cable size for your job. In Australia, we use the metric system for cross-sectional area (mm²). A common mistake is thinking "thicker wire is always better." While thicker wire reduces resistance, it is more expensive and harder to terminate. cable sizes australia

If you are wiring a shed, installing a new air conditioner, or simply replacing a power point, understanding cable sizes is critical. In Australia, using the wrong cable size isn't just inefficient—it is a fire hazard and a breach of the Wiring Rules (AS/NZS 3000). Voltage drop between the point of supply and