The most commonly used sizes of electrical wire in square millimeters (mm²) vary depending on the application, but here are some of the standard sizes and their typical uses:1. 1.0 mm²Use: Lighting circuits in residential and commercial buildings.2. 1.5 mm²Use: Lighting and light power circuits in residential and commercial settings.3. 2.5 mm²Use: General-purpose power circuits, including socket outlets and small appliances.4. 4.0 mm²Use: Power circuits for higher power appliances like air conditioners, cookers, and water heaters.5. 6.0 mm²Use: Heavy-duty power circuits, including electric showers, large cookers, and industrial equipment.6. 10.0 mm²Use: Sub-main circuits and larger appliances, often used in small commercial installations or where higher loads are expected.7. 16.0 mm²Use: Main supply cables in residential and small commercial buildings, or in small industrial applications.8. 25.0 mm²Use: Larger industrial installations, typically used as the main power supply cable.9. 35.0 mm²Use: Main power cables in large commercial buildings or industrial plants.10. 50.0 mm² and aboveUse: Heavy industrial applications, large building power supply cables, or connections to power transformers.These sizes are often used in different environments depending on the electrical load, building codes, and safety standards. In residential wiring, sizes from 1.0 mm² to 6.0 mm² are most commonly encountered, while larger sizes are typically reserved for commercial and industrial installations.

The most commonly used sizes of electrical wire in square millimeters (mm²) vary depending on the application, but here are some of the standard sizes and their typical uses:1. 1.0 mm²Use: Lighting circuits in residential and commercial buildings.2. 1.5 mm²Use: Lighting and light power circuits in residential and commercial settings.3. 2.5 mm²Use: General-purpose power circuits, including socket outlets and small appliances.4. 4.0 mm²Use: Power circuits for higher power appliances like air conditioners, cookers, and water heaters.5. 6.0 mm²Use: Heavy-duty power circuits, including electric showers, large cookers, and industrial equipment.6. 10.0 mm²Use: Sub-main circuits and larger appliances, often used in small commercial installations or where higher loads are expected.7. 16.0 mm²Use: Main supply cables in residential and small commercial buildings, or in small industrial applications.8. 25.0 mm²Use: Larger industrial installations, typically used as the main power supply cable.9. 35.0 mm²Use: Main power cables in large commercial buildings or industrial plants.10. 50.0 mm² and aboveUse: Heavy industrial applications, large building power supply cables, or connections to power transformers.These sizes are often used in different environments depending on the electrical load, building codes, and safety standards. In residential wiring, sizes from 1.0 mm² to 6.0 mm² are most commonly encountered, while larger sizes are typically reserved for commercial and industrial installations.