Using the wrong cable size is a primary cause of electrical fires and equipment failure. AWG to MM2 Wire Gauge Size Chart - LEX Products
The table below provides a general guide for copper cable sizes and their typical current-carrying capacities under standard conditions (single-phase, clipped to a surface). Cable Size (mm²) Current Rating (Amps) Common Application 10A – 14A Standard lighting circuits, fans 1.5 mm² 15A – 18A Two-way lighting switches, small appliances 2.5 mm² 20A – 24A Mains sockets, ring main circuits, washing machines 4.0 mm² 25A – 32A Air conditioners, high-power kitchen circuits 6.0 mm² 32A – 41A Electric cookers, showers, large appliances 10 mm² 50A – 57A cable size chart mm2
Note: These values are estimates. Real-world capacity depends on factors like installation method (e.g., in a wall vs. open air) and ambient temperature. Factors That Influence Cable Sizing Using the wrong cable size is a primary
Note: The values below are approximate for general multi-core PVC insulated cables (Copper) installed in air or conduit, based on typical IEC 60364-5-52 derating factors. Always consult specific manufacturer datasheets. Always consult specific manufacturer datasheets
A simple chart isn't always enough. Professional electricians use several "derating factors" to determine the final required size. Stephen P Wales Ltd Cable Size & Current Rating Chart - Spwales.com
The International Electrotechnical Commission (IEC) standard 60228 defines standard conductor sizes for insulated cables. The following sizes are standard across most regions using the metric system.