What cable to be used for power supply?

The appropriate cable for power supply depends on the voltage and current requirements of the device being powered. For low-voltage applications, such as 12V or 24V systems, use stranded copper wire with a suitable gauge (typically 18-14 AWG). For higher voltage applications, ensure the cable is rated for the specific voltage, such as 120V or 240V, and consider using cables with insulation rated for the environment (e.g., THHN for indoor use). Always adhere to local electrical codes and standards when selecting cables for power supply.