What is the voltage drop on 200 mtrs of 10 mm swa cable?

To calculate the voltage drop on 200 meters of 10 mm² steel wire armoured (SWA) cable, you need to know the load current and the resistivity of the cable material. As a rough estimate, the voltage drop for 10 mm² copper cable is approximately 2.5 mV/A/m. For a 200 m run, the drop would be calculated as 200 m x load current x 2.5 mV/A/m. For more precise calculations, please provide the load current.