GB/T 4074.14-1983 "Enameled wire test method, one-way scratch test" is a national standard, which stipulates the test method of enameled wire film one-way scratch performance. The content includes the test principle (by mechanical scraping to detect the film adhesion firmness), equipment (paint scraping device, force measuring tools, etc.), sample preparation (intercepting enameled wire samples), operation steps (controlling the scraping speed, strength and direction) and result evaluation (measuring the adhesion performance by the force value when the film is scratched). This standard is applicable to the mass inspection of various types of enameled wires, providing a technical basis for evaluating the film's mechanical damage resistance and production process stability, and helping to ensure the insulation reliability of enameled wires during winding and installation.