scope:

IEC 60695-11-10:2013 specifies small-scale laboratory test procedures intended to compare the burning behaviour of different materials used in electrotechnical products when vertically or horizontally oriented test bar specimens are exposed to a small flame ignition source with a nominal thermal power of 50 W. These test methods determine either the linear burning rate or the self-extinguishing properties of materials. These test methods are applicable to solid and cellular materials that have an apparent density of more than 250 kg/m3, determined in accordance with ISO 845. Two test methods are described. Method A is a horizontal burning test and is intended to determine the linear burning rate of materials under specific test conditions. Method B is a vertical burning test and is intended to determine whether materials self-extinguish under specific test conditions. NOTE 1 ISO 9772 [8]1 describes a test method for the determination of the burning characteristics to be used for materials with an apparent density of 250 kg/m3 or less. ISO 9773 describes a test method for the determination of the burning behaviour to be used for materials that due to their thinness, either distort and/or are burned up to the holding clamp using Method B of this standard. The test methods described provide classifications (see 8.4 and 9.4), which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products. NOTE 2 Guidance on pre-selection is given in IEC 60695-1-30. This second edition cancels and replaces the consolidated version of IEC 60695-11-10 published in 2003 and constitutes a technical revision. The main changes with respect to the first edition are listed below: - Editorial changes have been made throughout the document for the purpose of aligning IEC 60695-11-10 with IEC 60695-11-20, - Details on test specimen dimensions have been added to Clause 7, - New Sublause 9.1.4 Conditioning of the cotton pad has been added, - New Subclause 9.2.4 Evaluation of 'burned to the holding clamp' has been added, - New Annex C with examples of datasheets has been added, - The Bibliography has been updated and references added. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. This International Standard is to be used in conjunction with IEC 60695-11-4. Key words: Test flames, Fire hazard, Fire test