GB/T 18380.13 - 2022 focuses on the determination of combustion drips (objects)/particles in the vertical spread of flame of single insulated Wire and cable. It specifies the test principle and specifies the requirements of test equipment, such as combustion chamber, fire source location, etc. Detailed sample preparation, including interception length, Installation method. Specify the test process, such as ignition duration, time node to observe flame spread and dripping conditions. Through this standard, the dripping/particulate condition of single insulated Wire and cable combustion can be accurately determined, providing a basis for cable safety performance evaluation, helping to reduce the risk of secondary fires caused by dripping in fires.