This document gives guidelines for the assessment of the spread of flame from the surfaces of electrical and electronic products and materials used. Including: ——Explanation of the principles of flame spread on liquid and solid surfaces; ——Guidelines for the selection of test methods; ——Guidelines for the application and interpretation of test results; ——References. This document is intended for use by technical committees preparing standards in accordance with the principles set out in IEC Guide 104 and ISO/IEC Guide 51. One of the tasks of technical committees is to use this series of standards wherever applicable when preparing standards in this field. Unless specifically mentioned or listed in the relevant standards, the requirements, test methods or test conditions of this document will not apply.