Introduction to power cord

A power cord is a wire that carries electric current. The usual mode of current transmission is point-to-point transmission. Power lines can be divided into AC power lines and DC DC power lines according to their USES. Generally, AC power lines pass through AC power lines with high voltage. Such wires can be formally produced due to their high voltage and need unified standards for safety certification. DC line is basically through low voltage direct current, so the safety requirements are not as strict as AC line, but for safety reasons, countries still require unified safety certification.