Fire hazard testing - Part 6-31: Smoke obscuration - Small-scale static test - Materials

2Scope / Description

This part of IEC 60695 describes a test method for determining the specific optical density of smoke generated by materials used in electrical products, using the apparatus described in technical specification IEC/TS 60695-6-30. The specimen is vertically exposed to a radiant heat source in a closed chamber (i.e., without air replacement), with the option of applying a pre-ignition flame. The test method is applicable only to planar, solid, non-metallic specimens used in electrical products. This technical specification does not provide a classification system for material behavior. The test method is not applicable to materials that melt and flow away from areas directly impacted by the heat flow. Due to the limitations of physical fire models and the geometry of the specimen, further application of this test method to the development of electrical products is not recommended, nor is it recommended as a basis for the regulation or other control of smoke emissions from electrical products. Warning: Appropriate safety precautions should be taken, as the pyrolysis or combustion of the specimen may produce toxic and harmful fire products. This basic safety publication is intended for use by technical committees in developing standards in accordance with the principles set forth in IEC Guide 104 and ISO/IEC Guide 51. One of the responsibilities of technical committees, where applicable, is to use this basic safety publication in the preparation of their publications. Unless expressly cited or included in the relevant publication, the requirements, test methods, or test conditions of this basic safety publication do not apply.